Thanks all for the feedback. I agree that the title is a bit clickbait, but if I hadn't given this article this name would you have commented?
I agree with most of the points raised here (and on the Ruby NZ slack where I cross-posted it). I'm sorry if it appears that I'm shit talking Ruby and Rails. This is my day job too. We have a joke around these parts that Rails is "New Zealand scale" - ie perfectly good for most workloads in this country and I would tend to agree (although I've worked on a few projects now where that assumption was wrong).
I guess the point I'm trying to make is from a purely technical standpoint Ruby is not up to the job we're doing any more. I want to know what factors continue to support it's (obviously widespread) adoption.
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