Are you the type of runner who values their PRs more than being a life-long runner, or the other way around?
If you could have much faster PRs would you give up all the years of running you had since your college days?
I have a friend who was 3rd in the Pac-10 (it was the Pac-10 back then), but he never really ran after college. I set all my PRs after college, though they were all pretty sucky (I am slow). But I have continued to run, mostly injury free, for the 30 years since then.
Personally, I would not trade these 30 years of running (slowly) for one really good year back in 1995. Would you be willing to stop running forever if you could have one really, really fast PR?