By Bonnie Stiernberg We all know that vinyl has been making a big comeback in recent years — so much so that wax outsold CDs in 2020 for the first time since 1991. But according to a new report, physical media as a whole is on the rise, and CDs might soon give vinyl LPs a run for their money. According to data published by the Recording Industry Association of America (RIAA), CD sales in the U.S. increased for the first time since 2004 last year, rising from 31.6 million in 2020 to 46.6 million in 2021. Revenue from the format also increased, from $483.2 million in 2020 to $584.2 million in 20…