Correct me if I'm wrong but the bill you mentioned only seems to deal with marijuana, which I don't think is how most people get drug felonies.
1 - https://www.ussc.gov/sites/default/files/pdf/research-and-pu... (top of page 9)
You'd be surprised. Lots of weed? Cash? Baggies? Scale? Intent. Felony. Civil forfeiture (State of California v. A bag of $25,000 in cash). Go directly to Chino. Do not pass go.
It's usually the intent to distribute that ends people, and that does happen a lot with marijuana. Simple possession is easier to wiggle out of these days, depending on where you are and if it isn't much. Over a half ounce of marijuana in Virginia used to be a few years in prison (not sure if it still is). I'm carrying over a half ounce on my person right now and it'd be fine. Jurisdiction sucks.