Apache Guacamole
12,000 years ago when 10BaseT still roamed the earth we had things called X-terminals. All the X-terminal had to do was to run an X server, while all computing was done on the large (for the time, typically DEC or IBM) computers some-where else.  When X-terminals were packed up and sold by the pallet load we saw having "our own CPU" on our desks as a great liberation.  So here's my gormless question:  What has changed that fully distributed systems aren't as desirable?