New versus old top of the line speakers.

In 1967 I began my career as an audiophile. I bought Fisher XP9 speakers and two years later upgraded to the then top speaker in the McIntosh line McIntosh, ML-1C, just released April 67. The McIntosh Ml-2C and 4C came out 2 months later in the market place. Within a year JBL came out with their own top bookshelf speaker L-100. Unfortunately McIntosh no longer produces the old ML-1C product. But, JBL has now brought back the old line JBL-100. Speaker. The price has risen from approximately 550 a pair in 1971 to $4,000.00 per pair this month, 2019. I would love to hear the vintage L-100 compared to the new version of the L-100. Granted prices have risen greatly over time. But! For that increase in price has there been a huge or significant improvement in sound?  Those of us that have been around for 40 years, or even 30 often wonder over these impressive increases in prices to justify whatever improvement in sound we actually hear. Would it be possible to get the big reviewing companies like Stereophole or TAS to actually do a comparison of these speakers and show us, the stereo community, the improvements in sound we are getting for our money?  I still have my receipt for my ml-1C’s at $315.00 each or $630.00 per pair April 1967. My latest speaker, Coincident Pure Reference 4 years ago with a MFR cost of over 20K. A challenge to everone’s Ears and wallet!
All audiophiles want to know that any speaker upgrade actually provides the improvement in sound they are looking and actually is worth to their ears the costs involved. This true for all pieces of componentry we purchase. But speakers represent the single largest immediate improvement in sound our ears will ever know.