Have people that have grown out of heroku considered more dull but battle-tested solutions like CloudFoundry where you run a buildpack driven heroku-like abstra

Have people that have grown out of heroku considered more dull but battle-tested solutions like CloudFoundry where you run a buildpack driven heroku-like abstraction on top of your own cloud provider (or whatever you want really)? Very widely used by enterprise, but also free and open-source.