I have no expectations that at 75 you have retained the talents that made you a star at 25...I get it...
What I do expect to hear is the extensive catalogue that made you that star, not a geriatric Led Zeppelin cover band that throws in a medley of David Bowie and an assortment of songs I have never heard of.
We experienced this same crap with Pat Benatar earlier this year...playing half of her hits, a medley of some of the others, Neil playing "Ring of Fire", and new arrangements for many of their songs.
If you don't really care anymore, I also get it...you're entitled. But let us know that this is going to be "An evening with WHAT USED TO BE Heart" and price your tickets accordingly. I will surely pass regardless of the ticket price...