

I believe in the conspiracy theory that the reason connecting devices directly to each other anymore without doing a bunch of backflips through third parties is more or less intentional. If you could send a file to your friend sitting right next to you with some sort of wifi-direct or bluetooth or even just via usb-C cable that is seamless and actually works, it would impact every web service from facebook to onedrive. You also have a chilling effect on what kinds of data you’re going to share as well.
That said, tailscale is the ticket for me. The client is BSD licensed, and there exists a self-hostable server which is floss (headscale). Works like airdrop but better.
Or btrfs with snapper snapshots you can roll back to. Either way I suspect hard drive corruption. That’s usually what it is for me (although I do lose power with abnormal frequency)