Earlier quoted context omitted.
Because they are such an irrelevant part of the market that they basically could disappear and no one would care, and the hobbyist/non-professional people who don't mind using years-old software could as well just use Free/Open alternatives? There is nothing stopping Joe-who-only-pays-full-licences to continue using his MS 2007 Office suite, is there?
Os support, especially in the Apple world.
Products get deprecated/go out of support all the bloody time - there is nothing wrong with that: should Ford have to "support" the Edsel or Model T today "for free"? Why?