We were lucky enough to see them in Cardiff a year or so back. Maybe the progiest prog rock band if the all. Wow, what a gig! Three drummers out front, wind player, guitars (and the like, including a guy doubling on a "chapman stick") and Robert Fripp himself sat in a chair quietly at the back, despite him being the bandleader and main creative force. The music was complex, particularly the interaction between the 3 drummers - I didn't see sheet music but though it must be hard for the drummers particularly to keep it so precise and tight without it. As befitting such "serious" music, there was no light show, no "hello Cardiff" whooping and hollering, and just a polite bow between pieces. One of the best and most exciting rock concerts I'ver ever been to, and I wasn't a particular fan to be honest.
Here is the same line up, in a very similar performance to what we saw
View: https://youtu.be/3028oDEKZo4