This could be true, but is there any evidence for it? I have a ton of apps. Very few cost more than $5. Most were free, though sometimes with a paid-for service

This could be true, but is there any evidence for it? I have a ton of apps. Very few cost more than $5. Most were free, though sometimes with a paid-for service (e.g. Dropbox, Evernote) - which I would still get if I changed platform. If I claimed this lockin wasn't a serious problem, could you prove me wrong?