I have Ardour and I purchased Mixbus, yes it is behind, I went to the forum and tried to get them to improve
the Lua scripting handling by adding some user GUI elements as it was limited to having only a few scripts you can choose from at a time. They have gone to the trouble of making so many Lua bindings for so many functions but you are so restricted how it is. The scripting could be vastly improved to allow users do just about anything rather than waiting for the developers to add the features, as with Reaper that allows users to do anything but it seemed to fall on deaf ears with the developers.