I'm now a 15'' Air user after always being pro. I notice no difference in performance but enjoy the lighter form factor and damn does it run cool compared to the pro.

Replacing my iPhone was a nothing burger of choice, on paper the iPhone 15 pro was the best feature set for value vs buying a new iPhone 17, but Apple know that so don't sell the older models directly when the new models come out.

There's really limited impactful innovation when you get into the details.