Why would someone care about the look of a GUI dashboard for a PAAS and somehow base his choice on that ? Bootstrap, MUI, made by a designer, why should I care when there are dozens of more important points ?
And UX wise both have done a pretty good job at being plenty sufficient.
I get what you mean, the frontend dev community on Twitter seem childish and unnatural, spamming self gratification (don't know if it's the good term, basically trying to spread fake positivity all the time, trying to over talk about the inclusivity and woke social trends ) stuff and overusing using emojis.
I rarely check twitter but yesteday's Kent Dodds message section about a tweet announcing Remix's launch made me cringe.
Just stop making websites (especially documentation) dark mode only, that's a pain. At least when it's the other way around you can easily use an extension to get dark mode, here you're stuck with sometimes unreadable text unless you manually tweak the CSS.
It's better than using the MS builds but the SSH remote extension, python's new LSP ( Pylance ) and certainly few other plugins beside being close source don't even work with the open source builds of Vscode. ( + You don't have access to bunch of plugins if you don't manually edit your config to use Microsoft's store, which maybe against its licensing ).
If tomorrow Microsoft decided that some new versions of essential extensions should follow the same path VsCodium would basically become useless, I wouldn't trust Microsoft that easily.
And UX wise both have done a pretty good job at being plenty sufficient.