This issue was caused by a failure in communication between team members. That communication is just as important as good engineering.
It's not like Node, where evangelists DO go around saying it's the best thing ever and blindly ignore the problems with it. Now... there's a good target for snippy remarks! :-P
Furthermore, if Stripe already uses devops, then your statement adds nothing to the conversation (maybe this follow-up comment would have, but your original comment didn't), and if they don't, then commentary about a practice that wasn't being used is the definition of an off-topic comment. So in either case, your comment is worthy of downvotes, regardless of the merits of its topic.
I don't think I've ever seen anyone downvoted on HN for being opposed to established wisdom with good reason. I've often seen people downvoted who were being opposed to either established or non-established wisdom in a way that doesn't contribute productively to the conversation. They weren't being downvoted for their beliefs, but for their lack of productive contribution to the conversation.