Microsoft just did whatever they wanted with the web "platform", and so will Google.
In Microsoft's case what they wanted was nothing. They weren't a web business, saw it as a threat to their platform leverage, and so just left it abandoned and stagnant for years.
Google is simultaneously better and worse: they won't leave it stagnant because the web is their platform, but on the other hand they have a lot more to gain by abusing control of it.
We already have a number of Chromium based browsers that go against some of Google's most fundamental interests (e.g Brave).
Costs matter, and Web development costs are high. Google benefits from coordination, funding, and one migh presume, cost advantages, which would be exceedingly difficult for any comparable US or EU effort to match.
Development in lower-cost-of-living regions, perhaps most viably China, might pose an alternative.
Open source is that option. The economics of starting from scratch vs starting from Chromium's latest commit are fundamentally different.
I'm not saying that it's easy, only that it is not remotely comparable to the IE situation.
MSIE was bypassed not by a code fork of MSIE (itself originally based on the Spyglass browser, which was a fork of the NSCA's Mosaic codebase), but by independent implementations of an HTML-standard parser. Microsoft had some influence over Web development (noteably through ActiveX) but far less than Google has now.
My point is that Open Source of itself is not sufficient, and moreover simply is not viable. Glibly asserting that it is ... is utterly unrealistic.
Though the alternative of forking a Web-like markup and transport, as Gemini is attempting to do, is one option. For other technologies which have become sufficiently baroque, similar worse-is-better alternate paths have been pursued.
Otherwise, this is an antitrust issue, and Google very badly need busting.
And I didn't claim that it was. My point was merely that Chromium being open source changes the equation pretty fundamentally compared to the IE situation.
Whether it's enough to make a Chromium monopoly consistent with an open web, I really don't know. There are very good reasons to be sceptical.
I'm not seeing your more recent statement as consistent with the first, given my own response: "Open source without the option for an alternate development organisation to drive or steer development direction means vey little."
Again: Microsoft's locus of control was not based on source code or standards, but on its control over the PC desktop market. MSIE shipped by default with that desktop, and any other browser, including Chrome, had to find its way to that desktop.
Microsoft has now ceded its own browser engine (Trident, I believe) for Google's (Blink), with Microsoft Edge. As this browser still ships by default with Windows, Chrome owns that platform by default.
Google also controls its own operating systems, Android (mobile and tablets) and ChromeOS (Chromebooks). Given Android's overwhelming numerical advantage in overall devices,[1] Google effecitely have Microsoft's previous leverage mechanism to themselves.
Google as the dominant search provider have an advertising advantage in advocating their browser, both within search and on Google properties with "works best with Chrome" or equivalent.
And again, Google effecitvely dominate both development of Chrome and Chromium, including gatekeeping over what code makes it in to each project, and through its own browser development, dominance within WHATWG, and ranking preferences withing Google Web Search, as well as compatibility favouritism through popular Google properties such as YouTube, Web standards themselves.
Microsoft's monopoly lock-in had a single peg, Google has four (OS, promotion, Chrome development, Web standards).
I do have to admit though, yes: It is a completely different situation. Microsoft's advantage was far weaker than Google's now is.
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Notes:
1. "As of April 2022, Android, an operating system using the Linux kernel, is the world's most-used operating system when judged by web use. It has 43% of the global market, followed by Windows with 30%, Apple iOS with 17%, macOS with 6%, then (desktop) Linux at 0.98% also using the Linux kernel." https://en.wikipedia.org/wiki/Usage_share_of_operating_syste...
My point was merely that Chromium being open source changes the equation pretty fundamentally compared to the IE situation
Yes, and I stand by that. Chromium being open source changes the situation completely. It makes no sense to compare the IE era to any Chromium monopoly without even mentioning that Chromium is open source.
>I'm not seeing your more recent statement as consistent with the first, given my own response: "Open source without the option for an alternate development organisation to drive or steer development direction means vey little."
I don't see any inconsistency. I simply disagree with you. It matters a great deal that Chromium is open source. It changes the politics in the industry. It changes the economics. It changes the regulatory situation. It changes the facts on the ground in terms of available browsers.
I do get your point though, and it's not that I disagree with everything you're saying. I just disagree with the claim that open source Chromium "means very little".