I think everyone has valid points.  The dude couldn’t maintain what he did when he was young.   Age is a massive factor too.  Dude is about to be 62.  Add in what wine/alcohol, smoking, lack of sleep at times, elevation changes from travel, all of the years of that shit can factor in.  I saw a few videos of my grandfather 10-20 years apart and it was a trip how brittle his voice became over the years.  Also Axl didn’t really sing consistently for long periods of time over the years.  I’m sure that is a factor.  I’ll give it to him though.  He tries.  I’m sure it drives him nuts not to be able to nail the end of YCBM like he used to.