I like to use these things so I don't have to use JS for business and server-side logic, so I don't have to replicate certain things on both ends, and so I don't have to write myself a web API just so two applications I control can talk to each other. I have no problem writing JS for more complex UI stuff which is what I originally learned JS to do, and I enjoy it (though I enjoy the outcome more than the language). I know I'm not the only one who feels this way but I'm probably a minority.in