I am also surprised CA has not already legalized, but I have no doubt it will pass this time. 6 years of the culture shift like we have had means anything short of a 25pt blowout on voter referendums 5-10 years ago is likely to pass.
Even if the referendum fails, they can just shop around for a judge who’ll declare recreational pot use to be a “Constitutional right”. The precedent is already tried and tested.
It’s already pretty much had full legalization. If you go to doctor and complain you can’t sleep anyone will prescribe you marijuana.