And back in the "Microsoft has a monopoly on IE6" ruling's days, I did not use Windows or Internet Explorer, and I was not prevented from doing anything because of that. Netscape Navigator on Linux worked fine. Sure, I occasionally hit sites that were broken and only worked in IE, but I also right now frequently hit apps that are "macOS only" (like when Claude Cowork released, or a ton of other YC company's apps).
Microsoft was found guilty, so clearly the bar is not what you're trying to claim.
Yes, but that was coupled with other factors like them strongarming vendors, already being hugely dominant on desktops and abusing that position et al. I don't see this as being the same. Maybe my bar here is wrong, but it doesn't change whether they are a monopoly or not.
The issue was never "Microsoft has a monopoly on IE6". That's obviously nonsense.
The monopoly that Microsoft held was the home computer operating system market, first through DOS, then later through Windows. Holding a monopoly like that isn't illegal unto itself. What they were actually found guilty of was unfairly leveraging their monopoly on the OS market to gain the upper hand in a different market (the browser market). The subsequent range of issues we had with IE6 (compatibility, security, etc) was a result of Microsoft succeeding in achieving a monopoly on the browser market through illicit means.
Likewise, "Apple has a monopoly on the App Store" is just the same amount of nonsense. What you could argue is that Apple has a monopoly on the home computer market, or the mobile phone market, and that the way they integrate the App Store should be considered illegal leveraging of that monopoly, but that argument simply doesn't hold water — Microsoft's monopoly on the OS market at the time was pretty much incontrovertible, you simply couldn't walk into a shop and buy a computer running something else (except maybe a Mac at a more specialised place). Today, just about any shop you walk into that sells computers will probably have devices for sale running three different OSes (macOS, Windows, ChromeOS). Any phone place will have iPhones and Android devices, and probably a few more niche options. Actual market share percentage is nowhere near the high 90s that Microsoft saw in its heyday. At most, Apple is the biggest individual competitor in the market, but I don't think it hold an outright majority in any specific product class.
Mind you, I think that there is a good argument to be made that the Apple/Google duopoly on mobile devices does deserve scrutiny, but that's a very different kettle of fish.
You were not prevented from doing anything, but that doesn’t mean others weren’t. For example, OEMs were not allowed to offer any other preinstalled OS as a default option. That effectively killed Be and I’m sure hindered RedHat.
Microsoft was found guilty of using their market power to do product bundling, which is illegal. The fact that they had dominance in the market is not what they got popped for, nor is it illegal.