Earlier quoted context omitted.
Far in never. There's no (real) money to be made, manufacturers don't care. I use GrapheneOS. It's rough but at least it gives me peace of mind.
Why is there no money to be made? I would at least pay to buy the hardware and possibly for ongoing software support as well (depending on how they structure such support or any other "soft" features). E.g. I think its a jolly good idea if somebody really checked for a living all those open source apps. In any case if there is really no viable business model for private mainstream mobile computing we have been duped…
Not enough people care to use cut rate hardware that actually conforms to the 'wholly open' philosophy. Even Stallman couldn't maintain using fully open hardware. He had to switch to a Thinkpad with Coreboot.
People have expectations when using devices as complex as a phone or laptop to where, compared to even a desktop with Linux, having a smartphone that is fully open comes with serious drawbacks.
You could always get a LibrePhone or a Pinephone but you probably won't enjoy the experience.