In truth, like a drug we're weened to want more and more - with all the power available in the palms of our hand we expect relatively much more power and flexibility on the desktop - that much makes sense.
More importantly, we certainly expect existing capability, interoperability and flexibility to move forward with each new product - the reality that truly disgusts is the loss of those benefits due to profit margins and needless design changes.
The more bang for the buck is at Apple's discretion now verses buying options available to the customer.
I, like you, have resolved I don't need the latest or most powerful but I do need the capabilities I've enjoyed in the past to be merged with new capabilities -"more sauce please"!
Case in-point: I've got the Canon MX860 which is a fine MF printer for the last 7-8 years - works perfectly but no longer supported on 10.13.5 or Win10 we found out this weekend (Yes-Win 10 in the house because of my wife) - total nonsense even with a USB cable you can't print. And it's true - not Apple's fault Canon won't make the drivers - why?
This is the cycle I detest!
Aside: Win10 is a glossy mess - not entirely ... I see the "MacOS" subtly in the background waiting to be unleashed but unfortunately PC's (latest Dell) have a glitchy aspect to the integration of the OS and hardware where things tend to happen that you don't want to happen or, I've always seen this with Windows, "something is happening and you don't know what that is" - copied a file to the Diskstation (Share) and no indication on the PC it copied - checked the Diskstation w/ my Mac and the files were in-fact copied - then there's the multiple instances of the file windows - it pales to MacOS ... maybe in 5-10 when they take the useless fat out of it.
Happens on all OS's. Feel sorry for the wife. I am sure you remind her daily that MacOS is the way to go right?