The Apple v Apple trademark dispute arose more than 40 years ago, when it seemed reasonable to settle by giving the Beatles rights in music and Apple Computer rights in computers (which were, of course, separate things). It resurfaced 20 years ago, when the parties settled by giving Apple Computer TM rights to music. Today the Federal Circuit held that that settlement doesn't give Apple rights back to 1968, so Apple Jazz can oppose registration of Apple Music
https://cafc.uscourts.gov/opinions-orders/21-2301.OPINION.4-4-2023_2105121.pdf