> many items on that list that requires unencrypted traffic, those stillare usefull at the momemt but with https/http2 TLS is an encryption layer around the pr

> many items on that list that requires unencrypted traffic, those stillare usefull at the momemt but with https/http2 TLS is an encryption layer around the protocol (whether HTTP, IMAP, SMTP, etc). It's still very useful (necessary IMO) to understand the protocol to build an application on top of it. Whether or not traffic is tunneled through TLS in production (and it should :)).