I for one think they should go back to the old Are you over ... yes or no because it is just a pain in the ass to do to view videos and buy m rated games.
Im legal so I just put whatever gets me in january 1st whatever year I scroll to below the 90s.
There is no fact checking, so I am assuming its a ticker to track what ages are looking at content. A whole lot of 90 year olds love that call of duty and the witcher.