[tekno45]

how is https making caching irrelevant?

[pat2man]

At one point with http only your isp could do its own cache, large corporate it networks could have a cache, etc. which was very efficient for caching. But horrible for privacy. Now we have CDN edge caching etc but nothing like the multi layer caching that was available with http.

[afiori]

That sounds like it is one expiration bug away from debugging hell