Earlier quoted context omitted.
Those specific additional domains are useful in their own ways. .net is good for network infrastructure, .org is good for organizational purposes like mapping your office/LAN endpoints into it, so that employees could connect to VPNs and internal services like SCM and build servers. Other than that, additional domains also give leverage for diversification if you decide to make them publicly visitable one day.
> .net is good for network infrastructure, .org is good for organizational purposes Genuine question: Is there any tangible/technical benefit to this, or is it just for the sake of keeping them organised?
I can’t really think of anything else that would really benefit from having its own domain though, especially if your DNS infrastructure supports nested zones.