Most javascript developers want to use Javascript and want to use what's available in the defacto javascript package manager (npm) and want to use the build tool that works with the javascript packages (browserify). Suggesting using something other than Javascript, it's packages, and it's preeminent packager to get started with Polymer is exactly the problem parent was highlighting, and your suggestion is bloody not well helping.
Why the hostile reaction? Expanding your horizons is not a bad thing.
> Most javascript developers want to use Javascript
OP mentions nothing, parent mentions CoffeeScript.
Dart also has packages and an official package manager. It also has a dogfooded official Polymer library. Setting up a modular toy project with packages was easier to understand in Dart than JS for me. I don't see how I'm "bloody well not helping".
IMHO, if you (nonpersonal you) identify as a Javascript developer instead of a web developer, you're a very limited and narrow-minded developer. Learning a new language is easy, and installing some new tooling shouldn't take more than a minute nowadays. Looks like Polymer is installed using Bower anyway, which is pretty standard.
If you are a webdeveloepr that builds non-Javascript tools that don't integrate with the rest of Javascript tooling, you will have a very isolated, limited, unadopted and narrow-minded niche you carve for yourself.
