Is congestion still an issue? Seems to me like after the switch from 2.4ghz to 5ghz, congestion stopped being a problem since wifi hardly leaves your own home. Amusingly, in my apartment sitting on the balcony, shutting the glass door would cause a total loss of connection, while leaving it open resulted in a very strong connection.
The future is probably just having multiple wifi APs wired up and then just running extremely fast but low range wifi.
The future is probably just having multiple wifi APs wired up and then just running extremely fast but low range wifi.