During the last 10 years of my career I was lucky enough to benefit from corporate hospitality, and I saw a whole load of big name bands from the 70s (Stones, Who, Fleetwood Mac, etc) as freebies.
Pretty much without exception they were disappointing, not a patch on who they once were, and frankly nowhere near as good as most of their own tribute acts. The Actual Rolling Stones at the O2, for example, were absolutely blown away by The Counterfeit Stones, who I'd seen three weeks earlier (and paid for with my own money) at Kew Gardens.
I genuinely can't remember the last time I bought gig tickets for a 'name' band and I can't say as I've missed it. I'd much rather be gigging with my own band down the Dog & Duck than watching a bunch of octogenarians through binoculars.