> For many people, the difference between an ultra-low cost carrier and a mainline carrier is whether they have to walk through first class on the way to their seats. If you are going to get treated like cattle and upsold on everything anyway, might as well save a few bucks.

That goes beyond airlines and extends to everything. The trend I've been observing in every product and service category is the hollowing out of the middle: the market bifurcates, one part serving the cost-sensitive customers and getting stuck in a race to the bottom, the other serving premium clientele with highest-quality or bespoke goods/services, gravitating towards few customers and "if you have to ask, you can't afford it pricing".

Multiplying volume by margin, "lots of cheap shit" and "few pricey sales" are both sustainable, but the middle segment - "reasonable quality for reasonable price" - is not.