The bar is higher now which is what has really changed. Your thing has to work on every network, through multiple levels of NAT, without copy-pasting ip address

The bar is higher now which is what has really changed. Your thing has to work on every network, through multiple levels of NAT, without copy-pasting ip addresses or updating system files, often across multiple platforms. WebRTC is the focus because it won by a huge margin, other p2p protocols are a footnote. Everything uses WebRTC whether it actually has a web client or not.