It's only for extreme overclocks, not the normal overclocker.
the problem is that we don't know what will happen in thee years. what kind of bugs might appear because of the poorly designed socket. Even with no or slight overclocking.
If I'm to consider an i5 system, I want to be sure not to have that socket.
Is there a way to contact a company and ask them who made their socket on a specific motherboard ? Or is that just a fantasy of good customer service ?