In what way do they make it difficult? Leaving their ecosystem means you're giving up the hardware/software you've paid money for, so the only real question is data, right? I'm struggling to come up with ways in which Apple makes it hard to export your data. The best I can think of is you can't export your iMessages, and any TV/Movies you've purchased on the iTunes Store aren't portable outside of Apple's ecosystem since they're DRM'd (which is not a ploy by Apple to lock you in, but rather a requirement imposed by the content producer), though if you're switching to Windows you can still use iTunes there if you want. Everything else I can think of has at least some way to export it, e.g. Pages/Numbers/Keynote can all be exported into alternative formats, Contacts and Calendars can be exported, etc.