Yeah, it happened here due to standards from the EU, making all new cars use the CCS2 connector.Here they are retrofitting the V3 (which have liquid cooled cables), so that may play a part also. The Magic Dock solution will just be less expensive and more universal.
I agree if they were to switch to CCS1 here in the USA, it would make more sense to have two cables, as it's a nonstarter to require older Tesla owners to use the app to start a session. But with the announcement of the NACS standard, I think it pretty clear Tesla has no plans to do so.
v2 SuperChargers got fitted with 2 cables, but for v3 they are CCS2 only. Older S and X can get a modification and an adapter to support CCS2, but all the new cars are CCS2 native.
Even prior to this we used a different connector for AC charging that isn't Tesla specific.