I view it as more of a consequence of "fail closed" thinking than a lack of versioning. As we've seen recently with TLS [1], even protocols with explicit versio

I view it as more of a consequence of "fail closed" thinking than a lack of versioning. As we've seen recently with TLS [1], even protocols with explicit versioning suffer from middlebox brittleness. [1] https://news.ycombinator.com/item?id=17298747 https://news.ycombinator.com/item?id=17298747