I grew up on the ODR and still go out with my buddies in the winter. We have definitely noticed a pretty dramatic drop in cold enough weather for it to be feasible.
It's not so much that it doesnt get as cold as much as not for as long. We'll have a couple days of -15 to -30 which will be great, but then a week of close to zero temperatures melts all the rinks and they have to refreeze in the the next 1 or 2 days of cold weather and just don't have enough time before warm air hits again. The really good days for being on the ODR have definitely become more few and far between.
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