We need a truly distributed point-to-point internet asap. Politicians going to do everything to limit free speech and free ideas in the name of protecting children while they already got all the powers to investigate and stop child abuse.
Really depends on the context. Email works because of its limits. Remove those limits and weaknesses start to appear.
Yes.
A mesh network isnt point to point. Its a mesh.
Really the "fix" the ultimate goal has to be direct point to point.