I’m just generally musing about this, but I think it’s a very good strategy to not rely on just one OS vendor for a company’s mobile device strategy. Huawei comes to mind, post-sanction-wise. Although Sony isn’t in any particular danger of suffering a similar fate, I think it’s prudent to pursue an official co-branding effort with another OS vendor just to have on standby. Jolla fits the bill perfectly, due to their presence on the open devices program.
My concern though would be this. Does Google mandate that only their OS can be installed on supported devices, per some contractual requirements? I’m harking back to the time when Microsoft managed to squeeze Be out from any formal OEM arrangements to distribute BeOS on their PCs.
Ideally, if Sony could offer just a bit more support for an alternative (with proper support for bootloader locking, official DRM keys for the camera, etc) with an official flash option and support infrastructure, this could help Jolla spread their wings further and allow Sony to make SailfishOS a first class citizen on all of their devices. Thoughts?