I can't really call since June long term, but mine has been spinning away with very little problem. One or twice, the resistance has dropped off in the middle of a long Zwift session, but that may have been the result of a Ant+ drop off. It always seems to come back (sometimes to my chagrin).

My usage is very high too. I usually try to get my ride done really early in the day so I have time for the family. I can't tell you how many 5+ hour rides the trainer has on it. But my Netflix account probably can.