I don't have any problems with the campaigns to make the public internet HTTPS-only. However, for software inside an intranet, or software that just wants to expose an interface on http://127.0.0.1:*someport* non-SSL is the better default.

If people want to protect their intranet that's great, but it means that they have to go through the work of buying a cert, since only they know the hostname it will be exposed as. That's a poor initial-install experience.