This is mostly true — though keep in mind that corporate forward-proxy caches still work under strict TLS, by installing root CA certs through GPOs on corporate

This is mostly true — though keep in mind that corporate forward-proxy caches still work under strict TLS, by installing root CA certs through GPOs on corporate machines, that re-sign all connections. More importantly, if you're talking to a browser, the browser's own cache is in play. It's not an edge cache, per se, but it's just as important as one, and acts very similar to one.