A big rich company, a company that dominates the market for its product, and a company that dominates the broader tech industry are three quite different things. Market cap isn’t power.
https://www.ben-evans.com/benedictevans/2020/01/01/microsoft-monopoly-and-dominance
https://www.ben-evans.com/benedictevans/2020/01/01/microsoft-monopoly-and-dominance