If you create a channel on a TeamSpeak server (no matter if it’s a TS3 server or a TS5 server) and set the limit of the maximum family users to any limit via TS3,
TS5 recognizes that the channel is not joinable,
but the channel icon does not change.
In TeamSpeak 3 you can see that the channel cannot be entered.
In case of a channel with limited maximum number of clients (not family max. users), the icon also changes in TS5: