I think Windows 11 in particular is a confluence of two other problems with respect to competition:
1. Subscriptions instead of discrete paid versions removes the incentive to put out a good product. In the past, if the new version was bad it was a direct financial hit. But now there's no direct financial feedback loop, as long as it's not so terrible that you leave the subscription entirely
2. I think Windows 11 is the first time there's no other version of Windows still in support you can use to "ride it out"
1. Subscriptions instead of discrete paid versions removes the incentive to put out a good product. In the past, if the new version was bad it was a direct financial hit. But now there's no direct financial feedback loop, as long as it's not so terrible that you leave the subscription entirely
2. I think Windows 11 is the first time there's no other version of Windows still in support you can use to "ride it out"