All proprietary ones, but yes, of course. I don't know what you think I'm trying to avoid telling you—I've worked on a lot of codebases in a lot of languages fo

All proprietary ones, but yes, of course. I don't know what you think I'm trying to avoid telling you—I've worked on a lot of codebases in a lot of languages for a lot of different platforms over ~20 years, and repeated exposure to Rails codebases (maybe half a dozen of them?) has yielded the observations already posted: that they are like closed-ecosystem terrariums, which are beautiful until something goes slightly wrong, and then everything good about them withers and dies in short order.