no, there is no limit.
there is a limit (16) of groups with "serverChannelEnabled=true" set that a single peer can simultaneously be in where Cirrus will perform automatic group bootstrapping for that peer. but not counting automatic group bootstrapping, there is no limit to how many groups a single peer can be in.
Thanks Michael. I saw the 16 limit on another thread. Yeah the question
was about 1 group. awesome then thanks.