If they actually move all the settings over to the "new" settings app (it's actually 12 years old now): good.
It's an absolute joke that there are multiple settings apps in windows, with design inconsistency across them, and it being a crapshoot whether the screen you look at will support dark mode or not (can you tell I'm tired of being blinded on evenings by unexpected white windows? Lol).
If they don't move all the settings over: bad.
Yeah they're usually niche, but some of those options are needed!
Since this is Microsoft we're talking about, it's probably going to be the latter, unfortunately. "Oh you want to adjust some network settings? That's not in our settings app, and we've retired the control panel – you actually need to open Run and type ncpa.cpl"