Re: Reality cheque
5G is 4G, just rebranded and with more spectrum. Removing earlier standards would, in theory, make handsets simpler. But considering the support has been in the silicon for years, there's little real advantage in this. It's more likely that 3G equipment will simply not be replaced when it breaks because networks are no longer obliged to provide it. But they also have little incentive driving round and decommissioning stuff.