Thank you for making my life as a developer so much better.
I did not know about the "hate" before visiting this thread... and I don't get it and now feel a bit sad reading all this. I was using Makefiles, npm commands and custom scripts for quite a while, and they were a pain to maintain! With Grunt I can just throw in a couple of plugins and I'm good to go! I'm using it for more than just building my apps.. I do all configuration and generation of new source-files etc with it, and it is awesome.
Yes, there is a company that will make use of OS.js in a commercial product. More news about that will surface this year, so stay tuned! :)
And the Node backend is pretty much identical to the PHP one now... and PHP will probably be deprecated in the near future (at least from the main repository)
So far this is my favourite!