If only...
"If only there was a simpler OS"
"If only it had a more accessible appstore"
"If only the Desktop was better"
"If only it was as simple as Chrome OS"
...if only [argument-goes here] changed about the FOSS OS offerings, surely the masses would flock to it, right? Right?
No. No, they wont.
This isn't about the OS folks. It's not about the appstores. It's not about the usability. Ask yourselves, how many of those non-tech people using windows, have EVER installed windows themselves? Any guesses? Hmm? BARELY ANYONE. How did they set up their computer then? Easy: By virtue of it coming pre-installed from the store.
This is the secret sauce. This is the reason. And while the answer to "What does this come installed with?" is "Windows _", windows will remain the dominant desktop operating system. Period, end of sentence.
Windows doesn't win this because its so much simpler to use than, e.g. Linux. At the surface level, sure. Anything beyond that, and a modern Linux Desktop Env wins easily. Linux also wins on ease of install...I know its en vogue to criticise Manjaro, but have you tried the installer of their KDE version? It's pure bliss, and so simple, my Granny could set up LUKS herself with it.
And even at the surface level, a well put-together KDE desktop, or dare I say it, even GNOME these days, is easily as simple to handle, or even easier, than windows. I mean, short of actually inventing J.A.R.V.I.S from the MCU, how much simpler than Desktop-Metaphore, + start Menu, plus clickable-everything + searchable settings menu + appstore + preinstalled everything + super easy installer can it get?
But all that is completely beside the point. People don't use windows because it so great. People use windows because its what was on the machine when they bought it. Most people aren't in tech, and doing an "OS install" is, to most people, a much scarier prospect than changing the tires on their car...despite the latter being a lot more difficult and dangerous activity.
So, if the FOSS world wants to change that, they need to change how peoples access to consumer hardware works.