This is the crux of your whinge though, that you can't afford to buy a new Mac....
Dunno who you think you're talking to. My main Mac is supported by 10.14.
My opposition to this is that a) Macs are expensive so I don't think 10 years of support is unreasonable, especially given the state of computing where performance is not increasing that much, and the amount of money Apple has. If they can afford to make rubbish tv shows, they can afford to support their own machines. They've given support to machines less powerful than the ones they have dropped. b) It is an environmentally bad decision c) They don't have replacements for certain machines they've dropped (17 inch MacBook Pro I'm looking at you).
The crux of your whinge is apparently that you can't deal with criticism of Apple and must thus reply to my posts on not just one but two seperate forums to have your own whinge.
Perhaps Apple should continue to support PPC Macs?
Where the hell does that one come from? I mean sure PPC support was dropped too early (They should have gotten 10.6), they do not have the power to run 10.14. The 2009-2011 Macs do (if they were able to run a non metal required version, which is possible).
So should Apple support years-old machines that have the bare-minimum requirements even if the OS slows them to a crawl? Or should they compromise the performance of the OS on new machines and/or drop features to cater to the lowest common denominator?
2009 onwards (even some of the 2008 Macs) run High Sierra very well, especially with SSDs. So yeah, 10.14 with its fairly minimal changes in terms of new features that effect performance isn' going to slow these Macs to a crawl. They also don't have to compromise on the new machines. They are capable of targeting two versions of MacOS. They certainly have the resources and ability.
Yet you persist with your whinging about supporting old Macs, because you can't afford a new one. You do have the opportunity for hand me downs though, when people upgrade their Macs...
Who are you trying to reply to? Oldmacs or old mac?
Regardless, you persist on whinging about other people voicing their opinions on threads that you weren't even involved in because apparently you can't deal with any criticism of Apple.