Yeah, agree we are due for regression.
I do not personally agree with the new regime theory.
I DO think that warmer Atlantic waters can in theory help reduce suppression and perhaps lead to increased snowfall. Take for example 86/87, DC was crushed with snowfall. IF the SE ridge is a more permanent feature, with stronger intensification we can increase snowfall totals in suppression scenarios.
IMO, we lose out in borderline temperature snow events while increasing opportunities for large moisture laden snow events. I would be concerned if we didn't see North Carolina and the Delmarva see snow events anymore, which they just did 2 years ago.
This year comes down to a strong El Nino which typically floods Canada with PAC air. Last year was not due to lack of continental cold air, it was just allocated off and just on the west coast, which WAS beneficial for snowpack and reservoir water supply which they desperately needed.