Good question, the short answer is no :)

The long answer is it's absolutely everywhere in our codebases, with some code relying on catch-predicates, meaning we have to pull it out in exactly the right order else things will break in weird ways... and we haven't gotten around to tackling that yet.

Would love to get some help to get it out though - I raised an issue here: https://github.com/TryGhost/Ghost/issues/14882

I still use Bluebird library for things like property based promises resolutions and the map is a quick way to run only so many promises at a time instead of all of them or in series.