The big difference now with past racquets is the manufacturers make them cheap so profits can be increased. As a result they feel like crap. Old racquets were way higher quality than the junk they market now. Most of the technology is just recycled. Take foam core for instance. They used to foam inject a lot of racquets back in the 80s.
The most modern racquet I play is the Fischer Vacume Pro Classic 90. Everyone who hits with it loves it (even the Babalot croud).
I have old aluminum frames that play better than the junk they put out now.