Re: Why would you use email from 123/GoDaddy/HostPapa etc. anyway?
Compared to what you get from 123/GoDaddy, Gmail is pretty decent. Having to use it for a reasonable sized company is just painful though. Google are impossible to deal with; it is part of their SLA that if you can find someone to converse with*, that person seemingly had email explained to them that morning and it hasn't quite sunk in.
Next up is their account management tools, or rather, they should be but they aren't there. Salesdroid calls up because they've left their Out of Office auto responder on, and want you to turn it off? Either it waits for the droid to get to a desktop computer or they tell your their password over the phone...
Like most of google's stuff, they get it to a point where they can sell it or put ads on it, and then it is "good enough". Contrast with AWS (I know, not exactly like for like), every aspect of their APIs and UIs is polished.
* Via email, obviously. No phoning people up to ask why Joe from accounts' mailbox has been unavailable for 4 days without any status reports or service failure reports.