Dave Matlock would be worthy of consideration for the OnePocket.org Lifetime Action Hall of Famer award.
I disagree that bar table pool should not be deemed as the highest level for pocket billiards or pool compared to the 9-footers. That said, most bar table players of David's era could also play on the 9-footers and even snooker tables. It's just the action was more prevalent on 9-footers in pool's golden years, and for some gambling high and winning was more important than tin cups. Pool payouts truly have not gone that much higher today, e.g., $30,000 for first place in most events. The World Cup is the exception, of course.
One trait that players from the '70s and '80s had was they could play on all equipment and adapt to it fast. Today's pros sometimes stumble on new equipment if it's not what they're used to. It takes them a while to adjust. Me personally, I couldn't tell the difference between how a ball banks on a Brunswick Gold Crown and a Diamond, but according to Earl Strickland, the Diamond tables bank short.
Subject to check, I think David is house pro at a pool room in the Midwest and is probably still in dead-punch stroke. Last time I saw him winning at pool happenings on social media, he looked fit as a fiddle too.