Because they don't want a slow webapp under their logo. And this one would be particularly handicapped by that. Everyone praises Apple for user experience, rig

Because they don't want a slow webapp under their logo. And this one would be particularly handicapped by that. Everyone praises Apple for user experience, right? There you go. They're giving you want you want. And at least Chrome works on multiple platforms, even Linux. What seems like a more arbitrary limitation is that Inbox doesn't work with Google Apps. Thought it, too, probably has some technical reason deep in the belly of the beast.