You don’t have to buy it. Until you can’t get hold of spares for last years’ stuff any more… and then you’re screwed.
I’ve never worried about spares, there’s always something available either NOS or 2nd hand. The only thing that seems rare is straight steerer 29er forks as they were a bit of a flash in the pan.
90% of new standards are just incompatible irrelevances though.
Remember OS handlebars/stems? That was an upgrade you could make, and a lot of people did. A PF30 frame Vs a BSA threaded frame, there’s chuff all in it and all that seems to happen is manufacturers end up making BB’s to fit them that take the same old 24mm shimano chainsets, so what shimano does/says goes. And shimano have a vested interest in not making new standards because they’d like to keep trickling down stuff from XTR to deore, to alivo, and that means that the alivo equipped BSO will have the same standards as the XTR superbike for the foreseeable future.