For one thing - I like my internal network to keep on working even if the router goes down for some reason...
If we are talking about smaller networks where this is required, those use mostly NetBIOS name discovery anyway.
DNS will also be cached for a while.
And again, if we are talking about the networks this is required for, if internet is down, the fact that internal DNS is not working is less important.
Also, this debate goes both ways, if you external DNS server dies, its the same deal, and that also potentially influences you internet connectivity, etc.
And making a router redundant is MUCH cheaper then making a server redundant.
Do you actually want to have a serious discussion or are you here just to nitpick and troll?
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