I just watched my BluRay copy that I got for Christmas. Purple Rain is, imo, Prince's greatest musical achievement.
This isn't a criticism of the performance in any way, but an observation of the video production alone.
What I wouldn't give to have some better lights in this place. The entire affair is so dimly lit that it's a testament to the music that we still hang on until the end. How in the world isn't there a spotlight following Prince everywhere he goes on that stage? And Prince goes nearly EVERYWHERE in near total darkness.
The house of mirrors effect used during the entirety of "When Doves Cry" is tiresome. Thankfully it's only for that track alone, which is still a shame because it's one of his greatest hits and you find yourself looking elsewhere during the whole song just to save your eyes.
I think the house lights went on once the entire show, which is a bummer because that crowd deserved to be highlighted a bit more.
All 8 stars in my rating are for that incredible band and the genius leading them.
