If Google gets broken up (which I'm rooting for, but not even remotely holding my breath for), then Microsoft is next on the chopping block.
There needs to be a very strong case this time to go after Microsoft to argue for a break up of their business. Whoever is to bring the case (either the DOJ or the FTC), would have to go after Meta and Amazon first before targeting Microsoft.
It won't be easy, but Microsoft has been able to avoid scrutiny for years.
Many regulatory agencies would target Microsoft next, but they have played this game and are willing to do whatever is needed to avoid extreme measures like forced break ups and sell offs.