My home state, Oregon, decriminalized small quantities on all drugs, similar to what Portugal did back in 2000. In Oregon get a ticket or go into some treatment, tho not as aggressive at pushing for treatment as Portugal.
Mixed results. Many just pay fine, or don't pay fine.... only 1% go for treatment option. Treatment is paid for in large part by taxes on legal marijuana (Oregon was near the front on that drug legalization). I suppose the plus side would be folks don't end up with a criminal record, which can cause problems in getting housing, jobs, etc... https://www.usnews.com/news/politics/articles/2022-04-03/oregon-decriminalized-drugs-in-2020-hows-it-going