As a devops engineer working with CF daily, I definitely know where my apps are running, and that moving an app from cloud to cloud or to on-prem is not 'seamless'.

I have moved dockerized apps to public cloud CF to on-prem CF. It all worked because the apps where stateless to begin with. Pivotal appropriating all the merit of easy migration of stateless apps is dishonest at best.

Stateless apps are easy to move. They can be moved from CF to Kubernetes to ECS to Heroku.

Now, let's talk about the state, because that's where the real problem and the lock-in might be?