[_fq4v]

From wikipedia [1]:

> HTTP/3 (originally named QUIC) is an experimental transport layer[1] network protocol designed by Jim Roskind at Google,[2] initially implemented in 2012,[3] and announced publicly in 2013 as experimentation broadened

and then

> In June 2015, an Internet Draft of a specification for QUIC was submitted to the IETF for standardization

Unless you count 'developed independently by Google and then three years later submitted to IETF for standardization' as 'developed from scratch by an IETF working group', I fail to see how your assertion is backed by actual events.

For the record, SCTP has been standardized since 2000, and it was actually developed by an IETF working group.

[1] https://en.wikipedia.org/wiki/QUIC