They all went steadily downhill after 2013, as I've said. Prior to that, there were up's and down's, year by year. These days, I much prefer Parker's Heritage 24 year old to any of the Pappy's or the Buffalo Trace Antiques. Those others just don't float my boat any longer, and they are not worth the fuss to get bottles.
I also think that the 23 now drinks like a 20 and down the line to the 15 that drinks like an old 12 used to drink. I don't necessarily trust the age statements on Pappy's based upon my memory, my nose, and my taste buds. Hey, I'm just being totally honest. I'm telling you what I would tell a close friend. Save your money on this line.
This past year, all I ended up buying was a George T. Stagg. It was pretty good, but not worth driving half a day to get up to Rainier Oregon USA. I only drove up there because my Grandma was born and raised there and I'd never seen the town before. It wasn't much to see. If I could do it again, I would have passed on the GTS.
In all honesty, I prefer (and always have preferred) Scotch to bourbon. There are exceptions. I've tasted some amazing bourbons over the years, like that Old Rip Van Winkle rye whiskey from Japan with a cap with dribbled plastic like Maker's Mark. Yes, that stuff is up there with good Scotch whiskey, but most expensive bourbons don't measure up to even a fairly good Scotch.
I will take a decent single cask / cask strength Springbank over practically any bourbon that can be found for 3-4 times the cost. The old Heaven Hills were pretty good in Oregon though. I liked those a lot in the mid-2000's.
I drank a bourbon here and a bourbon there in the 80's and 90's. Nothing that special, however. Most of them tasted terrible then and they still taste terrible now.