I've tried a number of times to make the jump but the cost is so much higher for me $0 -> $120. I am grandfathered into google apps but even if I wasn't I'd rather pay $50/yr. Google is far from perfect but it does just work and I don't have to ever think about it. That might be the same with fastmail but switching is a non-zero cost (in time, and money and I mentioned above). I have 25GB of email in gmail and another 10GB archived off (from other accounts that I'd love to have all in the same place but worry I'd screw up all my email). I won't self host my email due to all the issues with that but I'm also not going to switch to another provider when the costs are 2X google and I'm not sure what happens if/when I hit 60GB as that is their biggest plan.
