None of these big tech companies really need to grow bigger. The smartphone is essentially done. AWS just prints money. Social/consumer apps are "done". What more is for them to do but collect rent?
The US government needs to break them all up. That'll oxygenate the entire tech sector, unlock value for investors, and kickstart the playing field for startups.
Google, Apple, Amazon, Meta, and maybe Microsoft. Break them up.
Apple was selling a desktop operating system that was a competitor to Microsoft Windows, Corel WordPerfect was a thing and so was Lotus 1-2-3.
Apple also had a much smaller desktop OS market share at the time. They nearly disappeared but are in a much stronger position today, which makes it harder to argue that Microsoft has a monopoly. There's no strict threshold for market share in these cases, but it's one of the factors taken into account.