Not knowing the details but reflecting on what the summary said and what I do know of Xwindows style systems...
Plan 9 sure puts a lot of trust in the network.
We have learned, since that time, that trusting the network isn't really a good idea. Even a local network might not really be trustworthy.
The division of services that they describe sounds quite wonderful for normal office tasks; but doesn't work well for networks that can shard or for remote users that tunnel in (VPN) and might be disconnected.
Plan 9 sure puts a lot of trust in the network.
We have learned, since that time, that trusting the network isn't really a good idea. Even a local network might not really be trustworthy.
The division of services that they describe sounds quite wonderful for normal office tasks; but doesn't work well for networks that can shard or for remote users that tunnel in (VPN) and might be disconnected.