The RX 480 is far from ancient and is probably one of the best cards that I've used. When I RMA'd my RX 5700XT (which still crashes after RMA), this thing was a champ. This card is still king for 1080p gaming and can handle 1440p too.
From the 480 there was the 580, Vega 56/64/VII, RX 5700 and now the 6800.
From a few random benchmark site checks online the 6800 is over three times faster than a 480.
Admittedly, to actually buy a 6800 series it is probably at least three times the price of a new 480.