I was in a band with a continuous revolving membership. People would join, not be able to get to rehearsals due to family commitments, then leave. Over the 3 years I was with them they had 19 members. We never had a full rehearsal, with every member present.
Not surprisingly, the gigs, what there were of them, were crap.
Eventually, after a long 3 years of this malarky, I gave up on them and left the band, which ceased to exist not long afterwards.