I can answer the first point.
We’ve already tackled part of that problem with the Parallel Sending feature that can be enabled on instances with a tremendous amount of traffic. Currently the only instance that makes sense to enable that is LemmyWorld and the only reason is so servers in geographical far away can get more than 3-4 activities/second.

With that feature, servers that eventually house and generate the biggest amounts of traffic will be able to successfully communicate all of those activities to everyone else who needs them.

I predict a 10x increase is well in our grasp of easily accessible by all of our current systems. 1000x? That’s a different story which I don’t have the answers too.

I can’t wait! We’ll finally get to do a real world test for the parallel sending features!! And if all goes well I’ll get to save 5 Euro a month!

Thanks LW

What a hero!