Set the default user limit for channels created by a particular primary channel, without editing the primary channel itself.
First join a voice channel, then run the command to set the limit for that channel and all other secondary channels created by the same primary ("+ New Session") channel.
Doesn't affect any existing sibling channels, only future channels.
Users can still run "vc/limit" or "vc/unlimit" to temporarily change/remove the limit of their own channel.
vc/defaultlimit N
Remove the limit by running
vc/defaultlimit 0