I appreciate this question is similiar to "how long is a piece of string".
How many cameras might usually be used to record a live event, particularly a band playing on stage? There must come a point when enough is enough.
Is the answer something like "3 static camera" and "2 moving camera"?
I know there is no rule, but the advantages of multiple cams (and costs) must, at some point, become pointless.
I would be grateful for any insight or experiences.