We have 10 more years I think until we can say this with confidence. We had a bonanza period that lasted about 18 years with a few duds thrown in. We were due for a sharp reversion to the mean-there's no way NYC can get away with regular 40" snow winters. So if this new regime started in 2018, that would be 2036 when we have an equally long timeframe as the snowier one.  Also the background warming means marginal snow situations 30 years ago would be rain now-so the bad years are even worse.