Fair. Although, I consider Microsoft’s market “Most laptops” since Apple kind of does its own thing and Chromebooks are ultra-low end laptops. Thus Microsoft gets ~95% of the market for themselves.

Personally, I’d say that’s a clear case of monopoly since MS controls this entire segment of “non-Apple, non-ultra low power laptop, PCs”, but you’re right - there are other players. The thing is, they have relatively tiny niches in which they thrive and in fact pose no threat to the monopolist.

But I now I see how you see it as an oligopoly, which is quite valid.

In practice. Technically, were M$ to go sue users left and right (or send those ISP-style “gotcha”, now pay up) emails.

Luckiy, M$ knows well enough that 90% of that userbase wouldn’t have too many qualms jumping ship if they got slapped with a huge fine, so M$ lets them be.

They value the high userbase more than a quick payout (and rightly so). However, there’s no guarantee that can’t change overnight (just look at Unity and before that, Adobe).

oligopoly

That’s a way to misspell monopoly, alright.