Oh yeah, those were fantastic little devices. It's a shame that it wasn't popular enough to warrant successors. The OpenMoko people did some really innovative stuff back in the day, but hardware is tough.
Put differently, limitations create interest, but they're also the opposite of cost-effective.
That’s why you don’t see many platformers for mobile. The ones that do exist auto run for you or put virtual buttons on the screen, which I haven’t found to work well.