Please describe the new feature or change.
Please consider adding mod support for MineColonies. It is a city builder mod for MC, with it's own "automation" system. It currently works by teaching NPCs recipies with its' own UI-Mask. Polymorph would be a great addition to that system.
-> https://www.curseforge.com/minecraft/mc-mods/minecolonies

Please describe why you want this feature.
Given that MineColonies is growing popularity, it is added to a multitude of modpacks, adding tons of new blocks/items to craft. Adding mod support would be another amazing application of Polymorph.