What might be happening here is that different teams of engineers are taking care of project templates and templates. Or this is the same team but the technical objects are different. Asana decides to make projects move faster than templates. This can be argued for sure.
However if a single feature costs twice to be put in 2 places, I’d rather have them test and improve with projects, and then add to template once it is stable.
There isn’t an actual number, we discuss it here 🦄 If Wishes Were Unicorns: Why Asana Might Not Have Implemented that Feature Request (and other thoughts about Asana feature development and product strategy)