Excessive volume has always been a problem, it's just that now, with better equipment, it's easier to be louder.
I remember my cousin booked a band for her wedding some 30 years ago. The evening venue wasn't big but the band were stupid loud. And on Friday I saw a band play a small venue and they were too loud, so in 30 years, not much has changed. I went to see The Dammed play a couple of months ago and the volume was so excessive I was thankful I found my earplugs in my jacket pocket. The volume was such that there was no mix, just an undefined wall of noise.
Some bands seem to think it's clever to play excessively loud, which I think is a bit dumb. The thing is today is that the PA will let bands play loud, so technically speaking they'll sound better. BUT, human ears can still only handle so much before they start to crap out. You can have the best and sweetest sounding PA but if you raise the volume beyond what people's ears can handle the band will still sound crap.