Damn, that means my 2014 Mini is getting closer to the chopping block. That'll be a tough call. Maybe by then I'll finally be ready for a strictly Unix box as a file server - most of my work is done on my 2015 rMBP and my Mini is mostly a remote server that I use desktop sharing for.
It's not a "chopping block." The only thing this affects is whether Apple will have repair parts in stock, and whether Apple will perform hardware repairs. Independent repair shops will still work on them, provided they can get the parts. For some parts that may be a problem, but for things like HDDs, no problem at all.
Meantime, Apple still supports current OSes, regardless of the machine they're running on. Most of the time, the current macOS will run on 7-year-old and even older machines.
Altogether, this thread is an example of 100% gold-standard click-bait, guaranteed to attract 100+ posts every time. Apple runs by a strict 5-year clock for "Vintage" status, and 7 years for "Obsolete." 5 years after the last unit of a model rolls off the assembly line, that model will become "Vintage." Two years later, it will be "Obsolete." This is not unpredictable, capricious behavior. It is highly consistent. While it may technically be "news," it's hardly unexpected news.
It's as if a newspaper posted a headline every day, "Somebody retired today." Duh! Time marches on, everything and everybody gets older. The nature of time does not change from day to day, and Apple's criteria for Vintage and Obsolete has not changed. Tick tock, tick tock.