If you just have to talk from many devices to the one server sure, but Tailscale sure makes it easy for many to many. Also if a direct connection is impossible (e.g. firewall of china, CGNAT etc) tailscale puts a relay server in the middle for you.

I can’t. I tried it first and installed it on my phone from f-droid. After opening it up, it connected to an already existing network with other people’s old machines from years ago on it. I was horrified.

So then I tried to delete my whole account and couldn’t due to an error. I sent them an email about it and they took like two weeks to respond.

Punchflat is good, but i’ts a bit of a cpu and ram hog when indexing. I had to disable it because it kept bringing the server to it’s knees, but if you have more ram headroom you’ll prob be fine.