I use it on android to talk to my synology and a proxmox server at my house from anywhere.
It comes in handy from time to time. I run a "public" subsonic server but I don't have most of my own productions on it, but I can open VLC on android and go to a bookmarked share and play it all there.
Also stuff like NVR camera feeda I can look at over tailscale, too. No "cloud" storage needed.
I wish there was an easy reliable way to do this that didn't involve a for-profit; but until awful things happen I am fine using this for low-friction, trivial network access.
I've used it on Android to stream the occasional video or song from my Jellyfin server while using mobile data. Not bad at all, plus they finally seem to have gotten their battery drain issues under control.
Recently, as I have been traveling through the Middle East and East Africa, I have also used Tailscale on my phone to protect myself on public wifis and to work around MitM attempts, see my other comment further up.
