Like the first radio stations had just started broadcasting when she was born, now we're all discussing her passing on a communications network that connects the entire globe. Possibly some of us while on flights from one side of the world to the other.
I don't think so. My grandmother was born in 1900 and died in 2003. Cars, airplanes, electricity, radio, TV, computers, space ships, etc..., all were invented or became commonplace in her lifetime. Queen Elizabeth was born between the birth years of my parents, who didn't remember the "horse and buggy days".
Arguably it's not particularly different now than, say, 1995 - 2000, which is the half decade of web search indexes (AltaVisa = 1995) and banner ads (1998 = DoubleClick IPO).
Travel, media, appliances, transportation, Internet, perhaps even music and fashion, haven't as fundamentally changed since then.
It may not be as big of a leap as no computers -> personal computers or no internet -> internet but I wouldn't say that the world is "not much different" than 2000.
Social media in particular has the potential to be extremely disrupting to society. There are things which seem possible that would have been unthinkable in 2000 like the fall of American democracy. And that sort of societal shift requires more than just the internet. It requires a hyper-online society which is enabled by smartphones and social media.
Remember that mobile phones were already "StarTac" sized in 1996:
https://www.webdesignerdepot.com/2009/05/the-evolution-of-ce...
As for social media, "Eternal September" was in 1993. In fact, I noted my grandmother's perception that people putting their thoughts out there was disruptive. In her mind that, like radio or TV that she saw get invented, this was obviously going to suddenly be everyone. So you're saying she was right. But she'd already seen it in the last millennium.
https://en.wikipedia.org/wiki/Eternal_September
As for "fall of American Democracy", actually, the 1960s and early 1970s didn't feel a whole lot different from the recent summer of discontent, and remember that the LA Riots were 1992. And for someone around since 1900, 'fall of American democracy' was, at several points, not "unthinkable".
In any case, "social media" hundreds of years ago was called "pamphleteering" and, for example, contributed to French Revolution: