Longterm official updates? Not that I've found. Your best bet is likely to buy a high-specced device that allows root + unlocking the bootloader and flashing a

Longterm official updates? Not that I've found. Your best bet is likely to buy a high-specced device that allows root + unlocking the bootloader and flashing a custom ROM. That's probably what I'm going to do (minus rooting), even though I'd greatly prefer manufacturer support.