The problem with those free OS is that they usually work on top models which cost like 4 ordinary smartphones. It is experimental software that doesn't work perfectly, and it makes no sense to pay that much for it. So with high prices they are push away potential users.
Also, I would like no DRM, no serial id, no support for device verification, no trusted environments, re-programmable IMEI, no locked bootloaders, no proprietary code and no telemetry in any form or shape.
Also, I would like no DRM, no serial id, no support for device verification, no trusted environments, re-programmable IMEI, no locked bootloaders, no proprietary code and no telemetry in any form or shape.