It depends. I don't run anything public facing so security updates that need reboots are less of a concern to me
My Windows servers are rebooted once a month for patches. My Linux servers maybe once every couple months for kernel patches or if I screwed something up. My physical proxmox hosts? Twice in the last year. Once because I moved. The other time because I upgraded to proxmox 8.
Nextcloud Notes for Personal stuff, to-do lists, grocery lists etc. I heavily utilize Nextcloud in my personal life. My server is fairly optimized and performant, the syncing is great, mobile app is decent and overall, it "just works" for me. It's also really nice having all that stuff in one place.
silverbullet.md for homelab notes, personal wiki-like articles and stuff of that nature. I love the interface and markdown support. It's easy to use, the search feature is really nice and it has modular functionality (using plugins). It's running on a vm fronted by a reverse proxy (for SSL) so I can easily hit from any device on the lan.