This is never going to happen fully, because there is a ton of software and also device drivers that hook into the OG Control Panel system and install their own .cpl’s there, which are required for that hardware/software to work. The system to support those is going to have to remain in place, otherwise Microsoft is going to have a lot of very angry corporate customers and hardware vendors up their noses in short order.

In fact, this is most likely the exact reason the Control Panel still exists behind the scenes the way it does today in Win10 and Win11. They’ll probably go to ever-greater lengths to hide it from home users, but I’d doubt they can actually remove it completely at this point.

In fact, from TFA:

Tip: while the Control Panel still exists for compatibility reasons and to provide access to some settings that have not yet migrated, you’re encouraged to use the Settings app, whenever possible.