Maybe because it takes way too much time? At one time I wanted to develop for these little machines, but when I got ahold of some of the development documents to do it, I found I would be spending precious time trying to learn alot of very archaic tomes.
It's kinda like this spend time trying to make a game that a few people might enjoy or put food on your table. Slave at what would be a labor of love that you probably won't get any money from, or spend that time saving up to get medical insurance.
Unfortunately I have to pick work over "fun" anyday.