I do believe the evidence is well established by now what happens in such places as in now-notorious cities in CA where misdemeanor thefts have been "decriminalized" or simply not prosecuted. Thefts increase because they go unpunished. What a surprise!
The state of Illinois is embarking on another social experiment by doing away with cash bail. I think I can predict how that is going to turn out, but I'll just say I'm glad that I don't live in Illinois.
Way back in the early 1970's when I was in college, one of the statistics that stuck with me for some reason was that 90% of the crime was committed by 10% of the criminals. That strongly suggests what to do with that 10%. I've seen nothing since then to suggest that the statistic has changed.