It was rough a few years ago, but nowadays it's pretty nice. TI rebuilt their Code Composer Studio using Theia so it does have some larger users. It has LSP support and the same Monaco editor backend - which is all I need.
It's VSCode-with-an-Eclipse-feel to it - which might or might not be your cup of tea, but it's an alternative.
Also it used to be kinda heavy, but it became lighter because of Moore's law and good code management practices all over the board.
I'm planning to deploy Theia in its web based form if possible, but still didn't have the time to tinker with that one.
Using Eclipse as "the Java LSP" in VSCode makes more sense now.
Nevertheless, as much as I respect Erich for what he did for Eclipse, I won't be able to follow him to VSCode, since I don't respect Microsoft as much.
It is kid of hard to avoid nowadays.
Here a session with him related to VSCode history,
"The Story of Visual Studio Code with Erich Gamma and Kai Maetzel"
I don't do Web Development, I live in the trenches. Since I don't own a desktop system anymore, I don't honestly game.
I'm exposed to them via systemd and Linux Kernel, yes, but at least both are licensed with GPL.
At least I'm trying to minimize my exposure.
For more context, please see >>44634786
Thanks for the video, btw. I'll take a look the moment I have time.