It seems to me that a fair compromise might be to disallow smoking (if it’s legal to do so) for anyone moving into the co-op property but grandfather in an exception for current owners and tenants who choose to smoke. the problem will fix itself over time.
“the problem will fix itself over time.”
While forcing non-smokers to bear the adverse affects of the smokers. I know that in some states you cannot create a “health nuisance” by smoking so as to cause the discomfort of others irrespective of the terms of your occupancy of your property. I would not be willing to wait for the offenders to “die off.” Smoking is a filthy habit.