We've been playing a related house rule since 3.0 - wizards spontaneously cast cantrips (and clerics orisons) - but are still limited to the number of times per day as usual.
I also never understood why they left those out.It also helps if you expand the bonus spell list to also include 0-level spells. I never understood why they left those out.
It also helps if you expand the bonus spell list to also include 0-level spells. I never understood why they left those out.