The general trend with cloud investment is that it makes utmost sense early in a startup or business expansion when time to market is the most important and uncertainty is high, but once the business stabalizes the assets move in house because of costs.

The cloud is powerful, but for long running businesses who can afford to invest in the competancy it's stupidly expensive. Hybrid cloud installations are ever more the norm, private clouds increasingly capable (PaaS, IaaS, SaaS), and toolsets like Kubernetes reshape how a lot of those legacy apps get looked at.