I’ll admit, I really hate gun carts at most matches. CAS/SASS shooters have had the right idea for a long time - carts stable enough to have their rifles pointing upward, instead of rolling around flagging everyone along the way. I’ve seen too many baby strollers and wagons rolling around with the buttstock down and muzzles pointing out at ~30degrees from the ground, flagging everyone they pass… of course, there ARE dolly-type gun carts which leave the driver flagging themselves during transport too… my CAS/SASS cart was enclosed, made from reclaimed barn wood, and stored the long guns vertically - which did point the muzzles in my direction when driving, which is why I had an AR-500 cut-off strip laid under the top cap.
I don’t really care to get shot in the calf by a rifle on a jogging stroller, or shot in the gut by a rifle laid in a kiddie wagon - I’m a pragmatist about flagging, and to me, carts are a MASSIVE source of muzzle flagging complacency in the shooting sports community.