The cycle of megacorps- this works in most industries with a lower barrier of entry.

First the industry begins as a bunch of small competing startups that build a shit ton of absolute trash. Eventually a few companies find the right formula and start to find some medicum of success. Innovation is rapid but quality is low.

Next the industry consolidates in a feeding frenzy of mergers and aqisitions. During this time innovation is high but demands for quality is also high. New startups are constant as the forming megacorps pay high prices to control innovation or suppress competition.

Then the consolidation reaches a peak. At this point innovation almost completely ceases as megacorps refuse to pay out any more. Quality rapidly decreases as the few remaining megacorps try to maximize profits. The entire industry turns to shit products and high prices.

The only thing that can save the industry from stagnation is government anti-trust action breaking up the megacorps into smaller competing companies like in the second stage.