This is a discussion that ha been had a couple of times but has been stuck in the idea phase! So that is to say there are other data points that there potentially could be an audience for this. Its come up with PyMC Labs clients couple of times who wish to have a simple interface for their employees to adjust prebuilt models.
The closest thing I’ve seen is https://www.statapillar.com/
So far though no one has done the on the OSS side no one has done the “quick prototype thing” where they build a prototype over a weekend, from my perspective its only a matter of time
CC @twiecki