The only metric that makes the round "relevant" at this point is price. I'll take modern proven rounds vs saving $4 a box and citing performance in shootings 20 years ago. Lead musketballs fired from smoothbore weapons once proved themselves on the street too and "worked". We have improved and continue to. I'll take current performance over 20 year old lore. Yes 9BLE has "street cred" and was the best out there at the time. HST and Gold Dot have been around to prove themselves as well and are used in hundreds of LE shootings every year. Also, properly calibrated gel is indicative of how the round performs in human. The 12-18" of penetration in gel required by the FBI takes bone, unconventional angles and clothing into account. Most people aren't 18 inches thick head on.