It feels like Tesla has never understood the peace-of-mind benefit that the adapters provide for their customers. While you may rarely use a given adapter, just having the adapter enables additional charging options that aren't possible without it.
I'll freely admit that I haven't used the NEMA 14-30 much since Tesla built out the supercharger network. But that's also because my overnight destinations haven't provided a convenient dryer outlet which would save a supercharger stop in the morning. The adapter is still there in the bag with the UMC, anticipating a destination where 14-30 is an available option, and I really appreciate having the flexibility.
Edit: thanks
@supratachophobia !