[Fluorescence]

> Eventually, even typing will lag or stutter. Quitting and restarting it brings it back to snappy-ish for a while.

Hmm. I've not experienced that. Something is leaking which can be identified/fixed. There are quick things you could do to narrow it down e.g. restart extension host or the language server or kill background node processes etc.

I generally have it running for weeks... although I do have to use "reload window" for my biggest/main workspace fairly often because rust-analyzer debugging gets screwed up and it's the quickest fix from a keyboard shortcut. I may be not seeing your issue for other reasons :)

FWIW I can recommend "reload window" because it only applies to the instance you have a problem with and restores more state than quit/restart e.g. your terminal windows and their content so it's not intrusive to your flow.

> but the fact that it takes an hour or two to repro makes that sort of too cumbersome to do

Yeah, I know what you mean. I now schedule time for "sharpening my tools" each day and making a deliberate effort to fix issues / create PRs for pain-points. I used to live with problems way too long because "I didn't have time". It's not a wall-clock productivity win.... but the intangibles about enjoying the tools more, less pain, feeling in control and learning from other projects are making me happy.