With you being a panfish guy, I'm surprised you didn't know about this technique already. Crappie anglers used it decades before the bass guys ever made it known as "drop shot rigging". In the crappie world, we always called it the "bottom bumping rig" but it was actually made popular and named the Kentucky Lake rig. Before depth finders and sonar, it was what people used to find cover and drop offs. You put a heavier weight on the end of your line to maintain a tight line and to make contact with bottom. Then you put one or two hooks starting at about 18 inches above that. We use minnows or soft plastics that way for years. The heavy sinker let you tell what kind of bottom was there and if you were hitting any wood cover. In some of the earliest published crappie books, this is described as the "bread and butter" technique of many anglers.
Then along come the bass guys doing the same basic thing, but instead of using the sinker as their eyes under water, they use it in conjunction with sonar. And call it a drop shot rig.
Btw...it's not as popular today as pulling crankbaits or spider rigging, but it still catches crappie and lots of em.