That's potentially because Neil Young wasn't on Spotify for 2 whole years.
Additionally, Yusuf's songs are regularly included on major TV shows and movie soundtracks.
I'm starting to think you're actually Yusuf. Neil's bigger than you, just get over it.
He headlined BST just before the pandemic. That's pretty relevant to his status as a UK festival headliner.
Let me check with SZA whether she reckons Spotify streaming figures are the biggest factor in headlining the Pyramid