Once you start making full use of your editor, switching to a new one and reaching the same level of proficiency takes a long time. I can edit code even in notepad, but I can't ever be as fluid in it as my main editor. I've changed my editor multiple times and it's a huge pain every time.

I guess they have lots of "solutions" to "design and implement".

They maintain a trademark on the name Visual Studio Code and some other bits. And it is maintained by a Microsoft team.

But the code itself is MIT licensed. You can build it yourself. I have. There are one or two forks of it out there.