Making a vet change a default if he decides he doesn't like a change upon
upgrading won't drive him away, but Emacs' unfriendly defaults are always
driving away noobs. Therefore Org's defaults should be noob-friendly, not
vet-friendly.

Probably vets should use legible settings as well. I became accustomed to
less-legible Org settings, and thought they were superior. But when I
cleaned up my Spacemacs config, I incidentally restored some default
legibility tweaks I'd disabled. After a brief exposure, I realized the
tweaks were superior, and that my preferences had been wrong. Changing the
defaults can overcome vet inertia and improve their UI.

> Terminals can display colors, underlines, italics, and bold text

Proposed legibility changes don't affect those font aspects.