Both top and adc are carries depending on how much theyre fed tbh, ADC are mega squishy at late game too and need a good tank and team to let them get damage from the back without having them take too much contact. Jungles like nocturne specialize is removing the back line of ADCs and ADCs themselves also scale differently. Ashe, beginner friendly is good early to mid game, but falls of late game, whereas, Vayne, has horrible laning and early game, even uptill lvl 10 she is hard to play, but her scaling after 2-3 items is disgusting, but again if she gets stunned or jumped its gg