The way I read it, the message you replied to was a complaint about parts of VSCode being proprietary. Do you mean to say Jetbrains is pretty ok on the "not being proprietary" front?

Yeah, 100%. I'm not a hardcore FOSS only person, but for my core workflow, when a FOSS tool exists and works well, I am not likely to use a proprietary alternative if I can avoid it at all.

So yeah, I'll use Excel to interoperate with fancy spreadsheets, but if LibreOffice will do the job, I'll use it instead. I tried out several of the fancy proprietary editors at various times (SublimeText, VSCode, even Jetbrains), but IMO they were not better _enough_ to justify switching away from something like vim, which is both ubiquitously available and FOSS.