Compatibility issues? Such as?
There are often very good reasons for limiting features on their products.
They have a very different philosophy to other companies when it comes to that. They focus of user experience, rather than focussing on generating a product with a long list of features, which are implemented half arse, or people just never use.
So depends what you prefer, a typical consumer elec company which focuses on including every little unused, and poorly implemented feature into a device, vs a company which thinks about what people actually use, think about how it's best accessed and used, and packages it all in a well designed product.
Funny how you can see typical market responses and trends with the iPod. People now bash them for fear of having something popular ;-) Not unique enough for some people anymore.