Anyhow, "dynaflex" sucks. But at least it still sounds better than the lifeless German CD issue.I only have a few Dynaflex LPs, and I only had a few back in the day. Although the thinness and flexibility always seemed odd, I never had an issue with the sound.
Now that I have a higher rez LP playback system than what I had in the '70s, I can hear differences among different types of LPs and make adjustments easier. What I've found with thinner LPs in general and Dynaflex in particular, is that they sound better with a record weight or clamp on them. When I clamp my Dynaflexes, sound quality--including slam, weight, heft, bass extension--is not an issue.