I have found over the years that trying new software risks immediately running into a road block in real use. There will be some detail or complexity or bug on a semi-basic requirement that goes directly to an issue in github.

Dokku is not one of those, it does what it does well and aside from a couple of cli argument ordering quirks it's been great for my light usage. If I was using it more I'd probably want to configure entire architectures with declarative config files, I have no idea if it can do that though.