Matrix does not have seamless desktop sharing or voice chat, and has a drastically higher executive cost. It also does not solve the information silo issue.
The fediverse as a whole is promising but likely needs to mature a bit longer. Theres a lot of potential issues that have yet to be worked through.
No, closest thing is to join a datahoarder group and trade when needed.
Although with LinkWarden gaining popularity, something like this developing is a possibility.