mods that add alternative recipes (space age galore, vanilla galore) result in tech-tree "spam" of productivity researches [each for their own varient oof recipe]. not sure if this is intended behaviour, or not. otherwise, throughout my testing, mod seems to work well with other moods

(not saying it's bad or wrong. just not sure if it's the intended behaviour)

looks like the way productivity works (in the engine) is it is assigned to a specific recipe ("x recipe bonus has +n% prod), so when mods add additional ways of crafting said item, it's a new recipe, and doesn't benefit from the same productivity bonus a [vanilla] recipe may have gotten buffed with. okay

Yeah, that's how it works, unfortunately - productivity is per recipe.