Less than 5% of the population knew what it meant to install an app when the iPhone launched. I believe Steve Ballmer ridiculed the idea when asked about it.

A great many amount of people use Android to this day because of its more open nature, and that's despite Google's involvement. If Motorola could go back to its native roots, shake the idea of Chinese influence, and do open source proper, I bet there's a lot more than 5% of the market ready for it.

Well 5% of a massive addressable market it itself quite a lot.

Try "aware, even vaguely, of the privacy issues standard smartphones pose".

(I would bet more than 5% have at least a vague notion of open source though, and a positive a priori - also possibly mixing it with source-available, which would be on par with some people we can read on HN)

It doesn't matter how many know what open source means - they all use it in some manner after all.

Take away open source and there would barely be a large tech company left standing.