[nickfromseattle]

> There's no lock in here. People are free to switch to one of the many competing services.

There is significant lock-in with email because:

1 - Email migration sucks and if you're a big org, this process can/will be complicated, expensive and carry potential down time for end-users.

2 - The bigger you are, the less willing you are to go through with #1 without a really, really ridiculously good reason

Migration is so painful some companies are still emailing from unpatched Exchange 2007 servers under the IT guy's desk.

[rhaway84773]

1 - That isn’t lock in. That’s like saying you’re locked in to your month to month rental apartment because you have to move so much furniture, and that has a hassle and cost associated with it.