No snaps is good but

1. Slack is a snap. Do you have to run it in the browser? I don't know if desktop sharing works well there, it's been years since I only used their app (Electron?)

2. Is flatpack optional or are there some mandatory flatpack apps that are part of the system? I'd like a deb only system.

3. Contrary to some of us I don't want to use a tiling window manager. Can I keep using my heavily customized Gnome Shell or do I have to use whatever System 76 created for Pop_OS?