Then they'd have a flood of new users. There are a handful of alternatives each with their own pros and cons but the key problem is lock in, psychological or t

Then they'd have a flood of new users. There are a handful of alternatives each with their own pros and cons but the key problem is lock in, psychological or technological. Even if Gmail were down for an hour every day, I'd have to think and work hard to migrate away due to (over)-relying on their service and some of the unique features it has.