Ads in the OS? That isn’t Microsoft’s idea, or even Apple’s (they have places they do it too). No, that was popularized by the mobile OS made by an ad company, Android.
Also as it happens I don't even see those because I exclusively use FDroid at this point. So ironically I see no ads when using a device designed and sold by an advertising company and haven't for years.
The apps I install from F-Droid often help me block ads in my browser, so I see very few ads as I use my phone day to day.
Meanwhile, my understanding is that Apple's App Store has ads in it, but that's the only app store allowed. So it seems like maybe iOS is the one that "has ads in the operating system".
> Try installing 1 app without seeing ads for 10 other useless apps.
So if you want to have a substantive discussion, it should be centered around the places in the OS where ads are present, whether competing products have ads in similar locations in their OS, and whether those ads can be avoided, both on Android and on other platforms.
My contention is that Android ads are overblown, and generally Android has ads in all the same ways iOS does, and not any more than that. There are of customized versions of Android that add various anti-features, but that's not what I'm focusing on here: I'm focusing on a user's ability to avoid advertising.
But I'm arguing in good faith, and putting in effort to focus on the substantive user experience. I get the feeling you're in this to win some semantic battle with low-effort replies, so I'm going to disengage.
I haven't used a phone in 10 years and surprisingly I haven't seen any ads on phones for years!
Samsung doesn't build the OS, but they control it on your device.