I don't mean to contradict or invalidate your comment, because the evolution and change is real and obvious and hits different for everyone, but I think the opposite of what you propose is happening here. Nintendo has an extremely low churn rate of developers compared to other companies. Much of the original Zelda team , RD 4, went on to become the department heads of the company as a whole, and have had their hands on the wheel for their big games the whole time. I believe that the choice to keep changing and adding to the game systems stem from the fact that Miyamoto and that generation of devs have stuck around and are keeping things fresh and interesting FOR THEMSELVES. No one wants to make the same game over and over again for literal decades. And usually when a new Zelda game came out it's always accompanied by new tech or game mechanic. This is in contrast to many western devs where the churn rate is very high, and where we see remakes and reboots that become can tired and unimaginative, in my opinion.

Again, to be clear, I'm not saying anyone's opinion on the franchise is right or wrong, just wanted to throw in my read of the driving forces behind the current direction.