> But it was of course a complete non-starter for pair programming. After having tasted Visual Studio (± Code) Live Sharing, there was simply no going back.

Interesting that the straw that broke the camel's back for the author was pair programming. I've been pairing pretty regularly for a long time now, and everybody using their preferred editor/IDE was never a problem. Live editing the same code is something we played around with every now and then, but there wasn't real utility. One person sharing their screen is pretty much how I've done it for the last five years or so. If we want to switch who's driving, we just commit.

Edit: In fact, my experience is that it has never been so _easy_ for everyone to use different editors. CLI toolchains, editorconfig, auto formatters and linters, LSP, ...