That's what I recall. So the average age is between 21 and 25 years roughly. Granted though A LOT of places are not upgrading their lifts. Age and condition are not an issue if they are running....and the last few years most of them haven't had major issues. During my tenure there NRX and Super Bravo had lots of issues.
Yes, your memory is correct on the age of the lifts. But like I said for NRX, it was rebuilt 2 years ago so the year originally built isn't entirely relevant anymore. Sure the chairs and towers are older...but the "guts" are new (drivetrain, electrics, sensors, etc). Bravo wasn't completely rebuilt, but also had major replacements of key components within the past few years. They had serious issues and did an overhaul of most of their lifts the following summer to ensure (as much as one can at least) that they didn't continue to have problems. I don't know why we keep bringing up problems that have been fixed. If they hadn't done serious lift overhauls, then you'd have very valid arguments. But they did, so those arguments are getting tired. As someone that skies there most weekends, I've been quite happy with lift reliability since the overhauls have been completed. Of course the problem is that since they had so many issues 4 years ago or whatever it was, that now every time a lift is down for 5 minutes we over-analyze it and say "Oh boy, more lift issues at SB!" Do lifts still break once in a while or have wind holds? Sure. But even new lifts are no guarantee that you'd have 0 problems. A resort in the Catskills that I used to ski a lot put in a new lift maybe 10 years ago and had more issues with it the first year or two than the old lift had.
Sunny-D and Village are both ancient but they also aren't key lifts. If I was in charge of the budget I wouldn't be making their replacement a priority either. I would however be making dredging that snow-making pond to full permitted depth a priority though. That is a mistake to have not done already just in case you ever did have water supply/drought issues. Maybe there is a valid reason for not having done it, but otherwise I have a hard time excusing that one.