Earlier quoted context omitted.
> Android can be more open but let’s not pretend that a lot of devices have locked bootloaders Not all Android handsets have unlockable bootloaders - but all handsets with unlockable bootloaders run Android.
I think you meant to say can run Android ?
However, my main point was that outside of niche devices[1] that are rounding errors for smartphone consumer market share: the vast majority of devices sold with unlockable bootloaders already run Android: I'd guestimate > 95%. Looking at the list of devices supported by LineageOS (after enabling "Legacy Devices") is awe-inspiring. In the past, Samsung, Sony and Motorola had a solid lineup of unlockable devices.
1. I say this as someone who almost succumbed to the temptation of buying the Pine64 phone with the intention of contributing code