I love the Spotify era where artists actually want, and some times need, to go on tour again. And while some artists might be capable of producing new good music, the sad fact is that the music we enjoy most was the one from our youth. So if bands from 20 or 30 years ago tour now, I always pray they haven't made anything new. Also, in the old days when bands made money from records not tours, the tour was usually "album promo" and you could some times tell the band was forced by the record company to do it to begin with.

The best concerts are breakthrough concerts for new bands (first or second album), and then the greatest-hits type concerts that are 10 years after the last album. Every concert that is a tour with album 3-4-5 is usually pretty meh.