They can tour all they want. And they will, as long as there are enough people willing pay lots of hard earned cash to see a geriatric rock oldies act. I saw them four times between '81 and '97. Almost saw them in '99 but walked away from the ticket booth in the arena(yes, there were tickets still available before the show) when I heard the price was $150 for a cheap seat.
Heck, 85 year old Chuck Berry is still out there on tour.
have seen them a few times in concert and prefer hearing them on an album. seeing a skinny old man dance around on stage doesn't do it. they really butcher some of the music for their live rendition. overall i am a fan