After my metric this weekend, I'm starting to wonder if I should get another year's experience (remember I'm only 2+ years in) vs. getting another year older (58). This metric had a series of hills about 30-35 miles in that had me wondering why I'm doing this

Ha!
Part of it, too, is that I have no friends that ride longer distances that can ride with me, so I'm riding solo. If I ride 45 or 50 with my daughter, it seems like nothing. Of course, those rides don't have the hills either. At least the few we've done together.
This ride I averaged about 13 mph, not including the stops, so I'm pretty slow. That being said, I don't think I've really improved a whole lot from a year ago to now, so maybe another year won't gain me much. Oh, and also, I put in about 4500 miles a year, but I don't train. I just ride. This year my goal is 5000.
So I don't know... I've got a month and a half to decide., It may be a last minute decision