Jony was promoted to this position around the time he was starting to wind down his time at Apple. When you’re at that high level you’re mostly involved in meetings and less with design. It’s probably why he kept doing outside design work for charity projects in his spare time. Jony’s role changed to something different and was probably paid a lot more. He could then save up to start his own company.
Jeff isn’t replacing Jony the designer, but Jony the manager. And I thought from what I read, Jony was the one that wanted the Apple Watch to be an expensive fashion item, and Jeff wanted it to be more practical to help people get healthy and be more affordable. It seems like in the end Jeff won, and the Apple Watch has been a runaway success (aside from App Store issues, which they are finally sorting out with native, unified apps and such).
If this is true that Jeff’s influence within Apple has been growing, then that could be why we are beginning to see a return to more practicality. I look at things like iPadOS and being able to access files on drives, iOS design improvements over the flat/thin design aesthetic to reign that in, or even things like the more powerful 2018 Mac Mini or the power and affordability combo found in the 2019 iMac (which I own), and I see promise. And while the Mac Pro is expensive and made for very high end users, the fact that a lot of the parts can be upgraded by the end user is welcome compared to the trashcan. If anything, I think Jeff understands better than Jony that design isn’t just how it looks, but how it works.
So if he can reign in crap like the horrible MacBook Pro keyboards (rumored redesign later this year), then I consider that an absolute win. He still has the design team that Jony lead, and they learned from one of the best. But Jony was missing his balance in Steve, and I feel like he probably got too arrogant and didn’t feel like anyone at Apple should be able to reign him in.