I expect that the field of Psychiatry (not Psychotherapy) will be shutting down in a few years as well.
Big Pharma Sweating Bullets As 80% of Cannabis Users Give Up Prescriptions Pills for Pot
The survey of 473 adult therapeutic cannabis users found that 87% of respondents gave up prescription medications, alcohol, or other drugs in favor of cannabis. Adults under 40 were likely to give up all three of these for medical cannabis.