I bet they're still the majority - the people who only use their phone do it through apps, not through their mobile browser.

Smart phones didn’t change anything here: 99% of their users didn’t care about the “open” nature of desktops before they were a thing, too. A vanishingly small percentage of computer users care about tinkering and openness. It’s been decades since tinkerers and hackers were the majority of computer users.

one could argue that the mobile era has put computers in the hands of the vast majority of people on the planet that couldn't even be bothered to operate a pc.

That tipping point was probably 1995 at latest.

That's the tragic outcome of that type of democratization and I'm not sure it can ever be fixed.

I don't actually believe smart-phones have done much to democratize computing power because phones don't give you much control over computing power. You can't develop software on a phone using a phone. And frankly the vast majority of phones have way more computing power than is actually used.

On a related point, the push to the cloud is befuddling when everyone has a phone with "free" (from the developer's point of view) computing power sitting there unused. Everyone's wasting money on centralizing compute despite more distributed compute being available than ever before.