The two are related. Work on Never Slow Mode stopped last fall. It picked up after the WebKit/Safari discussions last week. I doubt Chrome will ship a "never slow mode" but I see looser budgets, a la WebKit proposal.
It's great to seeing WebKit folks thinking along the same lines, and I hope to be able to discuss with them. Coalitions -- like the Mozilla/Chrome work on TLS adoption -- are critical in making progress in large ecosystems.
looks like it picked up on Jan 3 according to that PR?