Thinking of the first Woodstock and 2 or 3 day concerts back in the day... attended a few, had a great time, now in my mid 60's I think back to the last Dylan concert we attended a few years ago... young kids, middle aged kids and good turnout of folks with oxy tanks & walkers. Funny thing was it was in a hockey barn, no smoking allowed, concert started promptly @ 8 PM, house lights out and stage lights on, a huge wave of smoke came up from those with seats on the floor of the arena... we had great seats, I could read headstocks of the guitars being played on stage, someone passed me a joint, great players, Dylan was Dylan, mumbling words to his tunes.... bottom line is I saw some really great acts before the arena act days, some really great acts after arena/stadium time frame started, bottom line is the sound, tone and clarity is like 1000% better, then again back then it was a event of the community and few cared as to the ability to amplify sound, it was what it was.
I have very warm memories of back in the day concerts, they keep my heart warm. Wouldn't want to extinguish that warmth by trying to replicate such things in 2019.
Edited to add, My Abe Simpson moment for March 2019.