Is there a reason not to stay with Heroku and then shift to another PaaS later? Deis and Cloud Foundry both support buildpacks, so to some extent, it would be

Is there a reason not to stay with Heroku and then shift to another PaaS later? Deis and Cloud Foundry both support buildpacks, so to some extent, it would be possible to move off when the time is right. Disclosure: I work for Pivotal, we're the majority donors of engineering to Cloud Foundry. (I'm on the buildpacks team as it happens)