I use Wallabag for storing things to read later. Unfortunately, once the database grows past a certain point it’s not really feasible to use the mobile app anymore.

Arch Linux for my primary server. Raspbian for my SBCs.

SSH to shell in. vi to edit text.

Digital Ocean has basic virtual machines for $4us per month: 512 megs of RAM, 1 CPU, 10 gigs of storage.

I have a separate installation of Shaarli to keep track of my books. I have a slightly modified Shaarli theme to make it fit the use case a little better.

Check out Pepperminty Wiki, it’s about as simple as they get.

Everything I self host I use each and every day (every other day, if I’m busy). I don’t keep stuff hanging around just because.

Offsite backups.

Check out Pelican, it might be closer to what you’re looking for.