Most don’t have hibernate enabled because you’d need a swap or swapfile large enough to hold the full memory state. And with the larger ram sizes and sleep being good enough, at least until everything became s2idle only, no one wanted to set up a huge chunk of unusable disk for it.

I use hibernate with the swapfile on my disk secured with luks, without secure boot. At least on Fedora (and I’d suspect others) it does look like doing it with secure boot is possible. https://gist.github.com/Cryptophobia/e304a04fcb156dd0959fbba6b7a26106

Yeah, email is one of the more annoying things to self host. Google rejects mine because my ISP has all their non static IPs on block lists (even though my IP hasn’t changed once since I’ve been with them it’s still not “static”, can’t change the reverse DNS) and I’m not paying 150% more a month for a business account to get a static IP. I ended up just using a free email relay. Still had to setup SPF, DKIM, DMARC, and all that jazz still.