It is any easy cure, valve companies now have a valve with a built in adapter! All you need is an Allen wrench! So no matter where you go you can adapt to local equipment. As a world traveler I carry a valve insert so my Yoke first stage works! I think the reason for what your seeing is HPs were becoming the "New thing" and then people started looking at it as hbh2 did and shop owners realized how expensive it is to run the compressor to 4000psi! Wait and see if Cap-in-trade goes through!