Um, Ariana is selling big arenas just fine, and Dua Lipa is poised to do so shortly albeit the concert climate is at a standstill. When are people going to realize that at a certain point new music for the most part when it comes from an artist that's been around more than 20 years is for the long-standing fans. A very small few will keep themselves on radio beyond their early 30's like Madonna, Pink, Cher, Tina but that is a VERY small group. Nobody should be comparing Madonna's sales to Taylor or Adele or even Lady GaGa who I believe is 32 right now which is the age that Madonna was when she released her Immaculate Collection in 1990, which was followed by Erotica, Bedtime Stories, Ray Of Light, Music, and Confessions, all highly successful albums recorded during her 30's and 40's. Compare Madonna to her peers that she came up with. They are either dead, or they don't even dent the chart when they release an album. I recall that Madonna's Rebel Heart album was the 50the best selling album worldwide when it came out in 2015. How many albums are released every year? That's a darn good showing if you ask me as that was 32 years into her career at the time.