I feel your pain.
Years ago I threw a party for work friends and acquaintances where I had 30 confirmed and 10 tentative (from calendar invite). I bought a variety of drinks (alcoholic and non) and bought/cooked food for about 50 to ensure there was plenty.
… 4 people showed up.
That was the instant that I stopped giving a fuck. Ever since then I’ve adopted the approach of “I’m going to do something, you can come if you want, but I’m not planning for you”. Or, more commonly, I just don’t organize anything :)
EDIT: I should note that this was a recurring yearly party that got bigger and bigger over 5 years until it just died. Pre COVID.
Internal RAID1 as first line of defense. Rsync to external drives where at least one is always offsite as second. Rclone to cloud storage for my most important data as the third.
Backups 2 and 3 are manual but I have reminders set and do it about once a month. I don’t accrue much new data that I can’t easily replace so that’s fine for me.