I really like live performances as they show the musicianship without studio processing. Sure, recording in a studio shows what an artist(s) can accomplish using the studio as another "instrument" and that's important too. One of the main reasons the Beatles quit doing live shows so quickly was they were moving into creations that simply couldn't be done live. I've seen Pink Floyd live but even though it was great, much of their material is so nuanced it had to be done in the studio. But then you take someone like the Stones or The Who and they rock just as hard live, or maybe even better, than on record.