Well, yeah. The music is the GOOD part. I found out that the drummer for Santana at Woodstock played the White Rabbit in Freemont (Seattle) every week and went to see his band, “Spellbound” about a decade ago. They blew me away. Michael Shrieve. The guy spent his whole life getting better and better.
But Woodstock 99 and others were not the “national” event that Woodstock was. They are just wannabees. And yes, they were terrible.
I think your “slightly” is appropriate.
I did hear that Woodstock killed the hippie movement because it made it mainstream.
With Alvin Lee, he MAY share the prize for Best Individual Performance at Woodstock.