Too fucking bad. I don't give a shit about legacy devices relying on 2G/3G.
If you are a cellular operator, you should. A few decades ago, our local utility started a switch over from their own proprietary mesh meter reading network to a 2G/3G GPRS system. They got a ways into switching a few hundred thousand meters over when they got the AT&T memo: We're switching to 4G/5G. They went back and reinstalled their mesh network. Fool me once, shame on you. Fool me again, shame on me.
AT&Ts law enforcement network was even worse. They conned our region's police forces to switch over to FirstNet. Which they did for data, but not voice. Now the cops can't connect to their departments servers half the time. They have a dedicated (voice) channel for department IT problems.