It's fine to prefer M$ lock in to other lock in. I just take issue with blaming Jetbrains for lock-in while at the same time praising VScode which also has lock in.

I personally just use emacs.

Go on… what Microsoft lock ins in VSCode are you referencing?

The vast majority of vscode is opensource actually. I'm unaware of any major feature that is not part of their OSS project.

https://vscodium.com/

Isn't LiveShare proprietary and closed source?

Pylance is for sure, but it's built on the open source Pyright they provide, which is still pretty decent.

I think there's other things too but I don't recall the comprehensive list.

OP is referring to some of Microsoft's intellisense language plugins. They are not bundled with VS code by default but they are the best-in-class in terms of language support for autocompletion.

Embrace, extend,...

… Trebuchet?