One of the biggest challenges modern OS developers face (Apple and Microsoft namely) is how to make the new version of the OS appealing enough for users to move to. There are carrots like a fancy new feature, or sticks like “we’re not supporting this anymore, so if you want your computer to be secure you need to upgrade.” A lot of people don’t care about the carrots though. Their computer does everything they need it…
The OS does not have "appeal." It either works and facilitates my use of my own hardware or it does not.
The only reason to think this way is because you want to turn your paying customers PCs into advertising machines that violate their privacy and turn their hardware against them. There's not amount of "appeal" you can cram into your product that will get me to work against my own interests.