While I agree with the general sentiment only because I could never really get into Ruby beyond basic loops, and am beyond comfortable with JS, but it's hard to

While I agree with the general sentiment only because I could never really get into Ruby beyond basic loops, and am beyond comfortable with JS, but it's hard to take this JS evangelism seriously when their site doesn't even scroll right on mobile. That pattern of behavior is often indicative that the engineers care more about their concerns than their users, and in that case, why should we care? If you're not using the tech to solve your users problems, but just using it to hammer your perceived nails, the choice of tech is unimportant, IMHO. I'm probably nitpicking things, but if you're going to proselytize one path, show the best usage of it, not show off the worst usages of it in the presentation of it's benefits.