I think we could utilise the current bands much better than we currently do. As others have mentioned here there are a lot of devices violating the standards or

I think we could utilise the current bands much better than we currently do. As others have mentioned here there are a lot of devices violating the standards or not implementing the parts that would alleviate congestions/interference. I've personally seen plenty of devices that insist on 40MHz operation in an environment that can viably support only 20MHz. Then there's also 802.11ah for unlicensed sub 1GHz networks and 802.11af for licensed networks. If implemented properly, could shift some usage to other bands (especially if those devices can't handle modern features or require excessive transmission power to be reachable). Though giving everyone channel 13 and 14 would indeed be quite nice. It's clear that we can't get rid of 2.4GHz operation.