Check out this graph sgreg1. A lot of younger people do buy vinyl, but keep in mind this graph is bought at least 1 album, not the total bought. Over 55 are buying more than ever, perhaps a grasp at youth :-). The group 45-54 bought less in 2019 than 2018. This would be the first group who grew up with vinyl, but quickly replaced it early into adulthood. They don't have quite the attachment. Younger buyer are buying, but no real growth.
https://www.statista.com/statistics/1008779/vinyl-record-buyers-us-by-age/
https://www.statista.com/statistics/1008779/vinyl-record-buyers-us-by-age/