I imagine the issue was that in earlier WiFi versions, there weren't a lot of channels available. You basically got 2 or 3 (depending on which country you were in) non-interfering channels. The protocols also dealt with congestion less well, I think.
On a university campus, let's assume that at least one of those channels is taken by the campus WiFi, possibly more if they have separate networks for staff or whatever. At that point, you start getting a few dozen private networks running in the dorms, and the campus network(s) grind to a halt.
On a university campus, let's assume that at least one of those channels is taken by the campus WiFi, possibly more if they have separate networks for staff or whatever. At that point, you start getting a few dozen private networks running in the dorms, and the campus network(s) grind to a halt.