I too have been on a very aggressive mission to decloudify myself lately(as in, since comrade musk and co took over everything and I have 0 reason to trust him

I too have been on a very aggressive mission to decloudify myself lately(as in, since comrade musk and co took over everything and I have 0 reason to trust him or anyone around him). And to be fair, for all the hundreds of gigabytes of data I have, the migration took no longer than two weeks, on and off, and it works infinitely better than I was hoping. The only service I've outsourced is email since I hate dealing with MX records, IMAP/SMTP. For everything else, the one thing that did wonders was an Asus PN40 with a dual core celeron CPU. It's biggest strength is that it's both accessible and has a slot for an M.2 NVME and a SATA drive so you can have a safe backup in one spot. I too share the opinion that CalDAV is kind of sketchy. That said, Nextcloud covered most of my needs(although it can be slow for some things, even with redis backing it up). Calendars, dropbox/google drive, docs, photos, backups and automatic syncing - it covers everything really well. That, combined with several other open source solutions truly cover all my needs(music and video streaming, monitoring, alerting, vpn, readers, management, and various other utilities). And as under-powered this mini PC is, it handles everything insanely well with lots of room to spare, given that my ISP is a solid 10/10. In fact it would be perfectly capable of handling another 5-6 people like me with ease.