> Don't some e-Book readers disallow you from reading things that you didn't download from them (or they don't support epub)?
If theory 1 is true, then the readers without this user hostile approach will thrive. Obviously pirates don't care for DRM locked devices.
> But you also can't migrate your old library to the new one, which is the main problem with lock-in (the issue isn't that you physically cannot switch away, it's that you cannot switch away without losing things that you've bought into).
My point was mental, not physical. People might naturally just drop old stuff for new shiny things. If things appear plentiful compared to the old ways, this attitude is easier to adopt. Do you regret throwing away your coffee cup in the morning?