I've considered switching to iPhone many many times mostly just for iMessage and Facetime. Every time I change my mind after just a few minutes of considering what switching to iOS entails.
Yeah, I am not a huge fan of company lock-in. Apple makes their money on hardware, so they try really hard to keep people locked in [1].
"c. However, Craig Federighi, Apple's Senior Vice President of Software Engineering and the executive in charge of iOS, feared that "iMessage on Android would simply serve to remove [an] obstacle to iPhone families giving their kids Android phones". (PX407, at '122.)"
Yeah, Apple doesn't really seem very consumer friendly as people in this thread suggest.