Re: Beloved Telco you said?
I don't think "5G spectrum" would have been bought 4 years ago, given that 5G itself didn't really become a reality until last year. I would also find it hard to believe that spectrum of any kind is being "sat on" - they come with coverage conditions and massive costs so the network operators would want to get it into service and making money right away, likely using 4G equipment. Do you have anything to back up this claim?
There's only one telco who is really pushing the 5G broadband hype train - Three - who coincidentally are the only company without a fixed line network or aspirations to merge with one. BT obviously has one, Vodafone has a growing fixed line operation (using both Openreach and Cityfibre), and O2 want to merge with Virgin.
BT has already made clear that their direction of travel is fibre to the home, and as much of it as possible, currently targeting 20 million homes with about 3 million already done. Once the fibre is in place, it makes that 5G network and micro cells a whole lot cheaper to deploy. That isn't stopping them from doing a targeted 5G rollout where it makes sense - i.e. city centres
Remember, there are four mobile network operators in this country, and BT only owns one of them. How does whinging about BT explain the others?