Think about the difference between production from '81 to '89. Massive over just 8 years. Or even from '89 to '97. Or '66 to '69. I don't think much has really changed since Bridges to Babylon in '97 (my favorite stage, btw) for any musical act. For 20 years it's been kinda the same type of shows.
I guess when rock itself died, it coincided with really notable progress in how rock shows look. Makes me think of how the 40's, 50's, 60's, 70', 80's, 90's had distinct identities as decades but '00 to '18 is kind of an indistinct blur (I don't think I'm the only one who feels that way). I dunno, anybody have anything interesting to say about this topic that is probably boring.