Just learned about this here. I had been planning to get The One Plan on SIM-only when my T-Mobile contract ended, and was disappointed when it was removed - although I don't usually tether a lot, having an unlimited tethering allowance so that I didn't need to worry about using it up was attractive. That I'd just gotten in a few months too late to get the deal was annoying. Even though it sucks for people already on it to have it discontinued, it does make me feel a bit better about not being able to get it in the first place, I suppose.