Secondly - I have not seen Graal Python anywhere. Is there a repo ? The GitHub project seems centred around Truffleruby. Graal Python would be awesome!
In the end every build tool sucks. Sometimes you just need to be pragmatic. Mx integrates with maven pretty well and it generates ide config for intellij, eclipse and netbeans. Moving to a different system is probably not worth the cost atm. And it's not complicated to use at all. E.g mx build builds and mx gate builds and tests. Mx unittest runs unit tests.
As written below. Graal.Python is not yet open source. But you will hear from us soon.
Any splashy announcements expected?
p.s. sorry to be pushy. I have a long standing python-and-reactjs-on-java-in-2018 bet !