Back in maybe 2012-ish my friend built a new pc with some excessive amount of ram for the time. He had a small enough amount of stuff installed on it that he was able to just load the entire fs into ram, and just load anything off of it effectively instantly.

Maybe not exactly what you’re looking for, but Wanderstop could fit the bill. It’s a little unconventional, but to great effect; going in without too many preconceptions is probably the best way to play it.

When I’ve used Teams for meetings from my home computers, I use the web version (as I don’t really want to instal the app.) I’ve never had an issue with it on Firefox; not even on devices running Linux.