I have it on all my personal and family servers and devices. I use it so that for both myself and my family all our internal stuff (unraid network shares, jellyfin, homepages, photo backups, etc, etc) "just works" for the less technical members of the family even when they're not at home. It seamlessly detects when the peer is local so it doesn't route out to the internet and back, has an easy ACL to segment things (wife's phone doesn't need access to dd-wrt), and a bunch of other features.

We've been able to do this with existing VPNs for a long, long time, but tailscale is by far the most painless offering I've ever used and I migrated away from OpenVPN completely.