I don't know but I'd put my old Lafayette KT-550 tube power amp up against anything out there today and it would probably beat most of all the new power amps today. You can't find transformers like the ones it this amp anymore. Others are the Quick Silver MX/MS-190 tube amps, and a few of the AR amps maybe D-76A, etc., once you upgrade a few of the parts. I also recently hear a very highly regarded pair of boutique speakers they are made to be musical and I thought I was hearing a slightly improved version of ProAcs, ARs and ADS speakers. If you consider Miller Sound an expert on speakers then you would find Bill's speakers compete exceptionally with today's speakers once Bill performs a little magic on them. Just find an old pair of large Advents and have Bill work on them, then see what happens!
Anyway my long winded ramblings means that sure many older components are not as good as the new components today but there are some exceptions that are just as good as the newer components today or even better.