javispedro: I don't really get why they can't offer something similar to Moslo method. On Nexus 7 you can write Moslo first with fastboot, then boot into it, and it exposes the internal storage partition, which you can mount on regular Linux, format as any filesystem you want and trivially copy the OS image there. What prevents such kind of scenario in Jolla's case?

Out of all manufacturers, Jolla are simply expected to be open for this.