I dunno. It's something I have observed (to my woe) model after model. Canon does the bare minimum they think is required to sell "upgraded" models, but nothing more. Especially nothing they think might cannibalize their more expensive models.

Nikon more often does the opposite: they don't seem to worry so much about offending their upper tier models, and instead come across as trying much harder to squeeze more functionality into each new body.

As "Number 2", like Avis (the rent-a-car company), they "try harder". Much harder.

Cheers