This is a great topic for discussion. Personally I think for orchestration tools, picking the flavour that the team likes this most is the most important, i think BentoML works the same with all of them, since the Bento is an isolated distribution that is tools/cloud agnostic.
as for Metaflow, its has opinionated flavour towards ML orchestration, as for the others are build from a data engineering(ETL/ELT) point of view. might be worth to write a tutorial or blog featuring how would BentoML integrates with Metaflow!
i think the choices here will depends on your current workflow and team as well!