What do you do if you've been using Chromium as your default browser, though? (…and are concerned about privacy, so you don't want to install Chrome.) Yes, as you say elsewhere, Chromium is not the default browser on Ubuntu. But what do defaults mean, anyway? Ubuntu switches the default music player every other year, too, and at some point people will just stick to the app they like better.

I had always been under the impression that distribution defaults are suggestions for novice users. We've never had a situation before where a distribution like Ubuntu didn't properly support common alternatives to the default app.