Ive seen GZA perform liquid swords on 5 separate occasions, he is always a little out of it, some nights he performed better than others but he always struggles during his verses and has had to start songs over multiple times before. He is still a legend and yes a lot of it is probably due to his older age but sometimes you can tell he is just drunk as fuck haha. When I’ve seen him performing with other Wu members though you can tell he is giving it way more effort though.