Well, you've had Peterson, Forte, Gore and Williams all being some sort of useful to excellent into their 30s. Marshawn Lynch had 8 badass seasons, after being drafted 12th. Jamaal Charles has basically lost two seasons to injury in his 8 seasons in the NFL, but has been badass when healthy. There are very good running backs that last more than 3-4 years. For years running backs were over drafted. You can find useful ones later in the draft. And there has since been what I consider an over correction in how teams draft RB. But the top of the draft is littered with busts from every position, a lot that people simply forget if they weren't QB or RB. And you can and should consider taking the best RB at 11. Yea I think overcorrection is the right way to look at it. There were just a couple weak RB classes in a row during the same time that teams were correcting the RB valuation and suddenly "no first round RB ever" became a thing. But really a lot of the top backs during that time were among the top rated in their respective classes, they were just going in the second or third round, meanwhile out producing many first round busts at DE, CB, QB, etc.