Scale's great, but it often comes with a societal cost. For every efficiency made, there's less agency and decent jobs to go round.
Seems unfair to make such decisions ad-hoc though, and string it out through years of court cases and m/billions of lawyer fees.
Why not establish rules of the market where once a company gets x% market share, the company 'wins', the CEO gets the ability to run for high office, the nation thanks shareholders and gives them a big payoff for supporting innovation, and those 1 run down the food chain get to spin off their own companies and go for gold.
Life and death is a part of everything sustainable in life. We should embrace these cycles and utilise them, not let old hat stagnation strangle and squeeze all what's good from life.