Multipath TCP, what's the progress, if there is any?

[Peter G.]

A few years back a working group announced their work on MPTCP for 
FreeBSD, http://caia.swin.edu.au/newtcp/mptcp/. Around that time also a 
QR mentioned the project, 
https://www.freebsd.org/news/status/report-2013-01-2013-03.html#Multipath-TCP-(MPTCP)-for-FreeBSD

Since then all of this seems to have gone silent. The only recent 
mention is this page, 
https://www.freebsdfoundation.org/project/multipath-tcp-for-freebsd/

Is the development truly ongoing against HEAD? Where can I find any 
up-to-date info regarding this? Can't find anything.

Many thanks!

PG