Apple seems to have taken the direction of optimizing their experience to create beginners before supporting advanced users or pros.
There'e way more customers who are beginners, than advanced or expert users present.. until they all become more skilled.
Apple's products, and software aim to just work in the most basic way for the greatest number of people. Anything that is too far our of the range for basic users is either killed (Server.App), or sufficiently neutered.
If we start looking through the lens of creating customers who start out as beginners with Apple and grow with them...
Apple makes the iPhone so easy, it's like a feature phone. The tough App Store rules - to ensure the most stable experience for the majority of beginner and basic users.
Apple could design AppleTV off the charts - but we still have those largely basic menus, so basic that anyone can use an AppleTV easier than a cable box.
iPad Pro's could support mice for advanced users to use that amazing horsepower? No, let's go out of our way to remove it.
Mac Mini updates? Delay it until the average home is ready to have a new iHomeAutomationHub server once.
iMac Pro Updates? Probably have to sell them for $18K ea to start making it worthwhile.
Underpowered Macbooks, or Macbooks Airs? Perfect for selling lots beginners to intermediates.
MacOS, too, has fallen behind in it's UI innovation and polish. Apple's revenue largely comes from mobile, so rumors of MacOS going the way of a consistent iOS interface might not be too crazy.
What to do while the world levels up their digital skills?
We can wait, try to manage it ourselves, or switch to currently more innovative gear at the expense of other things.
MacOS has so many basic UI tweaks to install that one has to buy an app like Bartender to hide the icons. There is lots of work completed under the hood, no doublt, but not in a day to day way that we touch or use.
The main reason I'm still on Sierra is I can't handle the 4-6 month trauma of having a current OS like High Sierra that beyond the forced APFS snags, appears flaky. This is after experiencing every upgrade breaking with Panther, Tiger, leopard, Lion, Mavericks, El Capitan. Only Sierra was smooth.
It's just easier to wait to buy a mid cycle Macbook pro with the OS rattlesnakes having bit everyone else for a few years first.