I can understand why she's dedicating all her energy to tours these days. They appeal to a far wider audience than her albums and generate a lost more cash.
The last few albums have been really half-assed though.
In the 80's, she was more about great singles and the albums were somewhat heavy on filler.
But with Erotica, Bedtime Stories, Ray of Light and Music she was concentrating more on great albums. In the 90's the singles were still there, but the album tracks were interesting as well.
And I guess American Life was an attempt at a great album, but it flopped. So the two since then were just churned out so she'd have an excuse to tour.
I wish she would go back to being a clever rip off artist, find something underground and transform it into big commercial pop songs. Instead of just doing what Gwen Stefani and Nelly Furtado were doing three years back.
Hopefully her divorce and a string of hot studs will reinspire her musically.
I'm not saying she shouldn't still tour. If anything, the fact most of her audience for live shows is always going to pay to hear her older hits, frees her up to do whatever she wants on the newer albums.