Oof. Been using Pop OS on my System 76 Lemur Pro for a while. Ran through the install commands on this post and it broke my whole install. That's sad. It ended up installing an Ubuntu kernel next to the PopOS one and then the boot partition filled up and as I ran apt --fix-broken I ended up in emergency mode and couldn't boot to any kernel. I'm sure I messed up somewhere along the line but that sucks. Backing up via recovery now and re-imaging...