Very anecdotal, but I’m 35. Maybe it is just kid me, but I seem to remember clippers being unbelievably commonplace compared to now 10 years ago and when I was a child, and also LES events here in the Pittsburgh area being far more common. U don’t mean huge events but squalls, bands that would set up and drop a few inches, etc. what really stands out is that getting a few clippers/LES events in November and December seemed common with 1-2 inch type events. Those haven’t happened recently.
Finally, I think what really stands out is that when I was a kid the lakes froze and shutoff for LES by January. That generally isn’t the case anymore.