Most of what you are saying is bullshit and overly broad generalizations.

There are cycles of consolidation, followed by differentiation. Consolidation (through mergers and acquisitions) tends to happen in mature markets.

Differentiation occurs due to innovation and the creative destruction of stagnant markets by better alternatives.

There is not much innovation in the food market, but differentiation can occur from local sourcing instead of buying from large chain stores.

Tech on the other hand is absolutely ripe for another wave of innovation. That wave is on its way, but it requires some time to take effect. I personally am part of that impending wave.