Re: Perhaps it's this
Perhaps if 5G is rolled out and the data is cheap enough, we can finally get rid of the wired connection, now that would upset BT. The question is can data be supplied at a price that will match the price of wired + line rental.
How cheap is "cheap enough"? Don't forget that as things stand the "user demand" can be split between radio and line based systems; get rid of line and the radio system has to be upscaled to meet all the demand. In simple terms that means an expanded radio system, as in every site having to be uprated in order to cope with the traffic. In this case "uprating" means more hardware (including backhaul) and even more spectrum; for what exactly? Just to poke BT in its corporate eye? The cost to users will always be set by what the market will tolerate, and by removing line transmission from the equation you enable the radio system operators to charge more, not less, because you have removed one layer of competition for reasons of "spite" more than anything else.
By getting rid of wired connections you also force business users to piss about using radio connections for business purposes, and frankly that is stupid.
My apparent "support" for BT is not because I inherently support BT (the buggers are about to force my monthly costs up) but because when trying to solve a problem (real or perceived) it is preferable to find a solution, not introduce an even bigger problem.