Are you confusing vintage with not being able to support an OS? vintage is when parts are no longer available, not being able to support an OS is when the parts don't support key features. No offense to the author, but he grabbed a list of devices that support a feature of Monterey, of which there are 2 footnotes. No where in the text or the footnote say that this is an exclusive list for Monterey support, although some features may not be supported. I hope I'm right, because I support Big Sur just fine, but I am not on the list. We'll see later today I guess
Apple want to be able to support a Mac up to 5-7 years after they stop selling it. Hardware wise that's their
legal requirement.
They can draw their own lines on software support but obviously it looks bad if they stop supporting a product in software before the hardware support ends.
The point is here that Apple sold the 2014 Mini for far longer than they probably would have wanted and are now on the hook for support until at least October 2023 whereas the 2014 MacBook Pro is now
vintage as of a year ago and will soon be
obsolete.
Because the 2014 Mini lingered until October 2018 it won't be considered vintage until October 2023 and not obsolete until 2025 - long after the Coffee Lake CPU for the 2018 Mini (yes!) becomes obsolete and no longer available to buy.
Obviously if anything untoward happens Apple may have a stockpile on 2018 Minis or could upgrade people to an M1 mini going forward - the numbers of affected people won't be all that many I suspect.
But this why there's going to be a lot of whining about the Haswell decision which has split the MacBook Pro 2013/2014 users against the 2014 Mini users. Remember the 2014 Mini came with as little as 4Gb RAM, a 1.4GHz low power CPU (non-Iris graphics), and a spinning hard drive - none of which was officially upgradable.
Retina MacBook Pro users might have had a 15" model with quad core CPU, Nvidia GT750M graphics, and SSD but of course 2014 models will have been discontinued for over 6 years at this point and as linked above are already 'vintage'.
I guess this could be a key point for Apple. By moving the goalposts in this way they have just got rid of Nvidia Graphics cards from their supported line-up as the 2015 MBP 15" and later models went with AMD.
I'll not saying anything specific about feature support because it's too soon to say if Apple might be selective about borderline cases. I don't think it makes sense for Apple to declare that certain features are not available on certain Macs - they have already thrown a lot of Mac users under the proverbial bus for Monterey - although I would also add that Apple continue to go over and beyond for years of support for a product.
I could see these requirements staying steady for a couple of years when they can say goodbye to the 2014 Mini at the first possible opportunity and maybe move the goalposts slightly again.
Interestingly, thanks to Apple's product choices the 4 year Mac mini isn't the only aged product they will have to support for longer than they would have liked:
1. The MacBook Air which used Broadwell CPUs between 2015 and July 2019 (when the 2017 model was discontinued along with all of the Macbooks). These may have to have software support till Winter 2024 unless Apple decide to arbitrarily draw a line between Macs with the same hardware in again.
2. The 2013 Mac Pros will be vintage by December 2024.
3. The iMac 21.5" base model 2017 with Kaby Lake mobile CPU is still a current model - yes, it's due to go by 2022 but that just extends support until Winter 2026 at the earliest - I think it could go by October this year when the rest of the non 'Pro' ARM lineup is revealed.