Back 20yrs ago some of these strains you folks are listing (white russian, WW, chrystal, etcc) were pushing the limits of thc. These were often advertised as 17-20% thc. So of course at the time they were ‘super potent’ killer strains. However, since 25-30% thc strains are a dime a dozen now, if you went back to smoke one of those oldies you Would probably be very disappointed.
One can claim and Speculate that these strains were ‘lost’ but IMO and based on science and thc content, they just were never that potent in comparison.
Kinda similar to why nobody can find that ‘old school triple bag RKS’- because any killer stanky skunky weed back then seemed so special compared to m39 hydro commercial garbage or whatever else was around. 99% of potent weed ‘reeks like a skunk’ to a casual toker.
Anywho, just my opinion, but its yet to be proven wrong lol
Cheers