Update on Anidb integration to Sonarr?

The latest thread I could find on this were back in 2016 stating the Sonarr team was looking into it but that they didn’t have enough time on their hands at the moment.

How does it look as of now with the implementation? Would it be possible to add Anidb’s data base or was there a reason except for “not having worked on it” for it not having been implemented during these 5 years?