I think a lot of experienced developers are only using the good parts, it's difficult to learn but it can indeed be a very beautiful language when you use it with modules/jsLint/jsHint.
On our svn repo (team of 20 js devs) i've added jshint checking in a precommit hook. Devs who don't follow the rules literally cannot commit code. It was much less of a big deal than you would think.
Agreed... I only had to do a couple tweaks to my jshint rules (I prefer comma first, and a few other things)... but it wasn't hard to get used to at all.
Testing is another point... having JS tests can help a lot, though my opinions of TDD aren't as strong as many.
