Concur on the Chappell Roan discussion. If her management are pressing for top-spot stuff only, such as R+L co-headliner status, then it would take a festival affiliation perhaps to bring her here. There isn't a prior affiliation, the way Rodrigo speaks fondly of her previous appearance, for example.
Cheers. I know Glastonbury is mass genre as an event, but they just seem... so out of line with what generally gets booked for a band of their size. Didn't want to get hopes up, so to speak.