I don't need much from a phone, and just about any Android-capable phone would work for me, as far as OS and hardware capabilities go. The thing that's going to keep me tied to a Google-controlled phone for the indefinite future is Google Fi. I'm not aware of any other cell service plan that does what Fi does: $20/mo base, $10/gig after that (with everything from 6G-15G at no additional cost, after which you either get unlimited throttled data, or can start paying $10/gig for again). And the most important part of that (for me) is that it's the same price no matter where you are in the world. I haven't been traveling this year, but normally I would, and there's no other way I know of to use my phone internationally for so little (at least not without constantly swapping SIMs and changing the phone number).