Or Federated apps, again Self-Hosted.
And I think network infrastructure has been holding us back horribly. I think with something like Tailscale, we can make local-only apps or federated apps way, way easier to write.
In practice, it has an unexpected benefit. Whenever I hit a decision point where I'm not totally sure how something should behave, I can just ship it anyway without stressing about it. Later on, I can retroactively change how that action works by updating the function that processes events into state changes. It's hard to convey just how liberating this is, but trust me, this situation comes up way more often than you'd expect.
The tech is getting there though. With things like hole punching or webrtc, P2P is getting pretty easy to implement. Though it's still a challenge to implement it in an actual project.
I do believe that we're going to start seeing quality local-first software w/ great networking pop up more and more soon. I'm working on that, but I'm sure there are plenty others who are doing the same.
[1] Open-source, see my profile for info
I've found it to be a fun way to build apps.