Tribute Band attempts Corpse Re-animation

I saw a tribute band last night, for nostalgia mostly, that reminded me why listening tribute bands is sometimes a very bad idea. Band called Cryptical, pitched as the "premier Grateful Dead experience." I saw the Dead 5 or 6 times, but only once after 1977, and that was in 1987 or so. And that show was very boring, slow and listless. Which was in contrast to the older shows I went to, where they were energetic and actually veered towards edgy and interesting..... Somehow this band Cryptical, which is made of very talented musicians, managed to capture all the listlessness of the later concert while successfully achieving an accurate Dead impersonation. So in other words, they do a great impersonation of a band that had mostly lost what made them good in the first place....it made me realize that the only thing that made the Dead worth listening to was the hope that Jerry Garcia would lift off and really play something special. Which he often did. Not as often as somebody like John McLaughlin or Jeff Beck, or Frank Zappa, but when he did, it was brilliant. So last night I heard this very good guitarist, who clearly has some excellent chops, trying to improvise by the numbers, by the way he thought Jerry Garcia would have played it. Once, doing a Chuck Berry song that (I suppose) the Dead also covered, he actually started playing differently from Jerry Garcia, and his band-mates smiled, and he sounded authentic. But the rest of the time, it was like he was trying to reanimate a corpse, and it sounded stilted and fake. I can forgive a lack of skill, but I really hate hearing music played with skill, but only impersonating a personal style. Ugggg...Remind me to avoid Coltrane Tributes too. Some things are more sacred.