As someone who was in the sparsely populated field at Bestival 2013 and also in the roadblocked Pyramid field with 100K + others in 2023, I would say there has definitely been an increase or resurgence in his stock in those 10 years.
Bestival (Sunday Best) now bankrupt, didn't have millions to pay headliners then either.
To be fair I think 1975 will get a reasonable crowd but agree that I don't think there will be many turning up to watch if they're not already fans. I reckon Loyles will be similar to that of Qotsa when they were against Elton, I definitely agree that likes of WH, Woodsies, Park etc will be heaving though.