2015 - which seems to be when Lulu last surfaced - had various other older heritage acts drawing reasonable crowds on the bigger stages - Lionel, Burt Bacharach, Patti Smith, Mavis Staples etc so I'd not really agree that there's been a shift.
That said, if you were to posit that 2024 is looking so threadbare that Lulu will actually become a big attraction because there's f**k all else on then I'd probably agree.