A multipoint VPN that punches through NAT and can be configured to do a lot of neat things besides.

Nothing that a network guru or even a sufficiently motivated hacker couldn’t do on their own, except that the maintenance is practically zero for the personal user and it’s actually easy enough for a very nontechnical person to use (not necessarily to set up, but to use), perhaps with a bit of coaching over the phone. Want to use a different exit point for your traffic? It’s a dropdown list. Share a file? Requires one config step on the client for macOS, once, and then it’s just in the share menu. Windows, Android, iOS are ready to go without that. Share whole directories? Going to require some command-line setup once per shared directory, but not after that.

There are features that are much more enterprise-focused and not as useful for personal stuff, but everything above is in the free version.

I’m not in tech at all, professionally, and never have been. I’m savvy for an end user - I can install Linux or a BSD, I can set up a network, I can install a VPN myself to get back to my home network - but I would never, ever call myself anything more than an interested layman. I probably could figure most of this out on my own, if I had to. Thing is, I don’t have to. It’s more than just Wireguard in a pretty wrapper.

Try it. It won’t take long to figure out why so many people here like it, even if you may not want to use it.