It doesn't have to be thrown out, just keep using Windows 10. Oh, but you still want security patches for your old hardware and insist that it must be free - got it.
I suspect if you were willing to cough up a few $B you could get companies to support any old hardware that you want, indefinitely.
They likely ran the numbers and decide that it would be sub economic due to the small number of takers. Offering support for a very high that actually covers the costs + ROI would be laughable and just create negative PR.
You seem to misunderstand. I'm not asking "does this program exist". The program does exist. But it is de-emphasized in favor of "lolz just buy a new computer".