Well of course many more were — and I don’t have to prove it was the “norm” at all — the point is it was previously more of a disincentive to carry your stash with you when it was illegal. Now it isn’t.
Analagously, if it’s illegal to possess a weapon while driving your vehicle then it makes more sense that if it were made legal more people would carry weapons in their vehicle. No need to prove the “norm” of how many carried in their vehicle prior to the new law.
Which has zip to do with the roads allegedly being "even more dangerous."