Stefan H.

I don't understand how a Product Manager does not see the need for this feature.

Yes, all that Prakruti says is totally true and all is possible, but all involve MISSING or potentially missing a chat first. The idle option has a huge potential of missing a chat. The reason I've come across this thread is that I want to log out an agent right now as she's stepped away for lunch 3 minutes ago. Setting the idle timeout would not kick in for at least another few minutes (realistically seen; you probably want to set this to 5> minutes) and in that time customer chats may be assigned to her.

Also, Zendesk apparently did see the need for a similar functionality in Talk, because there it is available. 

Anyway, I'm with the requestors of this feature here and do think it is needed despite all the workarounds offered by Prakruti.