So, my '60, which I've had since '76, started to sound little weak in a couple spot to me a couple years back. I am pretty familiar with it, having it so long. I have easy a thousand gigs on it, so not just at home. So I built a homemade Gauss meter. I could see a couple poles were really low, some low, and most fine. So I got a neo magnet, very strong, and recharged them. This was the same magnet recommended by a builder who uses one to charge new pickups. Worked like a charm. Thing is, it didn't change the sound that I knew so well, it still has a really nice rounded high end. The only modern pickups that come close, that I have tried, are Don Mare's. Apaches are really good for that, but they use alnico 3, so there is that. They didn't get quite as strong as most new pickups I tested with the meter, which may come down to the actual composition of the pole pieces. This may be why some builders soften the magnets, demagnitize them a bit. Not so much that the older magnets lost all their charge - most of mine were actually pretty close, it was just a few that were WAY demagnitized. It may simply be that the older alnico just couldn't charge up as much. I believe this is a significant factor in why newer strats do not sound the same, to me.