As for design choices... well, there's not a huge difference between the N900 and N810 except their physical size. There's not a huge design difference between the iPhone and the iPod Touch either.
This anti-cellular movement is really getting me down.
I could just as easily complain about there being an infrared port which most people never use, and I hardly ever use Bluetooth or the memory card slot either. But I'm not going to complain because I recognise that these are important to some people and they don't add any significant problems for me. And the more people that buy this device, the more software support I will receive too.
The problems that people cite with cellular are nothing to do with the technology but entirely to do with the business practices of cellular providers. And that's a regulatory problem, not a technological one.