[dceddia]

I think you're right that Rails basically built up the Ruby ecosystem around itself, whereas most of the JS libraries are just riding the wave started by... Node and NPM, I guess? It's much more fragmented.

> ...or you're building on top of those modules and adding configuration conventions and scripts, in which case, congratulations, you've just written Sails.

This doesn't jive with a lot of what's been done in the JS community, at least frontend anyway. There are a TON of libraries that already had perfectly good implementations, where people just decided to reinvent the wheel because they "couldn't find any X library that did what they needed." (see: anything to do with forms)

Backend too, though. There's Express, Koa, Hapi, and more. They all basically do the same thing.

Maybe it's just a difference in mindsets -- maybe JS devs prefer light libraries they can cobble together vs. kitchen-sink frameworks? But then there's the counter-example of the popular frontend frameworks (Angular 1/2, Ember), so I'm not so sure that applies universally either.