Yeah, there'll always be companies like that but as more and more large orgs, government departments, etc. migrate all their email over to Gmail, I'm starting to consider that as a niche. Those orgs are also disproportionately likely to want to build their own thing because they have a hope of making the economics of scale add up.
True for big corps, although it's quite strange given they're usually the most paranoid ones on security.
But I was more thinking about techie SMBs to whom running a chat/collaboration server is not scary, better in terms of flexibility and cheaper than paying someone to handle it.
