>>30316936They really don't, though.
People who played red/blue are starting to have kids, and this trend will only increase into the next gen.
The games need to be new-player friendly, this is necessary now more than ever before. Parents will be more inclined to invest time in the franchise if the rules are largely the same as when they played the series as a kid/young teen.
If Gamefreak wanted to shake things up they would have done it in Gen 4/5, now more they will be sticking to a formula which is now old (and successful) enough to become untouchable.
If they want to make difficult, competitive spin-offs that's fine, if they do that they can also make the mainline games even more kid-friendly and everybody wins. But the mainline series is not changing and nobody from the devs to the marketing team to Nintendo itself want the golden goose being ruffled too much.