As long as you don't need to share any of your services with non-Tailscale users. Otherwise you'll need to set up some sort of public server.

But you can also try to get them to be Tailscale users and effortlessly share the devices with access control features they built. I share my home servers and game servers with family/friends easily while still keeping everything off the public internet.

But now your friends and family are locked into a proprietary system, subject to whatever the future incentives of Tailscale end up being. How many people can you connect on the free plan?

Yea, but my friends and family would rather have a service that just works, has apps, etc instead of an open one. Tailscale is a good actor ~for now~ and ~for now~ thats good enough for us. Not everyday in every situation can I be an activist. I have a list of alternatives incl FOSS ones should I need, but I'll cross that bridge only if I need to, since this JustWorks.

You can connect one person on a free plan, but each person can have their own free plan that you share devices between.

Everything in Tailscale is Open Source, except the GUI clients for proprietary OS (Windows and macOS/iOS), and the control server.

Headscale [1] allows one to implement a self-hosted, open source alternative to the Tailscale control server.

[1] https://github.com/juanfont/headscale

Almost all of tailscale is opensourced at this point besides the GUI.

Does headscale do all the same NAT traversal that Tailscale is capable of?