I tried it a loooong time ago, for C, and I couldn't get the hand of it, even though I had used IntelliJ a bunch.

I've heard it's much better than when they launched it, but our build system is so eccentric that I don't think it'd get along well at my work.

yeah, I tried it when it first came along, and I didn't get along with it too well, but it seems quite good now. But yes, possibly might be tricky with different kinds of build environments, I haven't really dug into that side too much.

IdeaVim always seems extremely buggy to me compared to what I'm used to in vscode-vim

odd, never really had a problem with it, of all the vim emulations I've found it to be one of the best. It's not fully featured, but none of them are.

I also use vscode-vim.

My biggest complaint is that Shift+V and selecting lines will sometimes jump to completely random spots in my file. It makes it unusuable sometimes.

in what Jetbrains product? I use Visual Lines all the time in webstorm, rider, and clion for multiple purposes

possibly some other keybinding is getting accidently triggered somehow..

IntelliJ ultimate! It's the default config so idk! It happens quite a bit when editing twirl templates (scala mvc), so maybe it's that.