At one point, my Gmail was my primary email. Losing it suddenly would have created some enormous pain. Since there would be no way of recovering it, short of a Google employee on HN or Twitter taking pity on me, that seemed like a highly unwelcome risk. Even if the risk was just 1 in a million, I didn't want to take that chance. Moved to my own domain name and services which will provide some customer support if there's any problem. That peace of mind is worth the small price vs. Google's free.