I'm all for MS bashing and laughing at their incompetence, but was there really any threat there? I don't know anyone on PC who was interested in buying a game anywhere other than Steam in 2015.
Windows RT also drew ire from people other than Newell at the time IIRC. It was widely perceived as a trial balloon for closing down Windows almost completely. The first Steam Machines a decade ago were Valve's answering trial balloon. Both failed, but Valve learned and Microsoft largely did not... They haven't locked down Windows 11 to the point of Windows RT, but they're abusing their users to the point of potentially sabotaging their own market dominance for consumer PCs.
As for how many, that was 10 years ago, I hardly can remember everything I ate last week.