Around 3 or 4 years ago, like approximately when the Model 3 started shipping. It makes a kind of sense. A lot of people were getting Model 3s and were setting up a lot of different circuit levels and charging options. Some people couldn't fit in a new extra 50A circuit, so 14-30 was becoming a more popular choice. Or some people had existing 10-30 outlets. Or some people were doing 6-20. Or a lot of people were getting the wall connector instead an never using any of the plug adapters. Continuing with this idea that the most holy 14-50 was the be-all, end-all one single thing was kind of not applicable anymore, and giving out thousands and thousands of them that were not being used was a bad idea. I do think they should have switched to a different system, where they just include an online voucher in people's accounts with a new car purchase, where they redeem it for one free adapter of their choice. That would make sense, where if they are doing a 14-30, they can get that one with the car.
By buying a $45 adapter. It's not a big deal.
That still comes with every car, so you won't need to buy another one of those--just buy the adapter you need.
You don't need a totally new charging setup. The car comes with the cable. It just needs the adapter for whatever type of outlet people have.