The Road to QUIC 8 years ago
Too much complexity.
I find it interesting how everything has to be encrypted and 'secure' now. The excuse is always the NSA, but let's be honest: A new transport protocol isn't going to protect you from them. I think there's a lot more to the cellular baseband and Intel ME backdoors than anyone can imagine.
Google is going to do the same thing with this they did with HTTPS. Soon enough, you'll be penalized through search and/or Chrome for not supporting it.