I think it's an unwarranted assumption that cheap necessarily implies "breaks quickly". Some cheap things last for eons; others don't - if anything, the low-end market may well be a place where the largest improvements can be had.

And even if longer-lasting stuff implies es some extra cost, I question whether that extra cost is significant in the sense that it would change market positioning (i.e. a 10% BOM increase is huge considering the kind of markets this affects, but still not nearly enough to close the gap with the more luxuriously branded stuff).