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Re:Tell HN: Slack decides to close down IRC and XMPP gateways by AlexandrB on Wednesday March 07, 2018 @05:51PM (#16540733)
> What is their moat

Their moat is that the addressable market is too small for investors to bother investing in.

Re:Tell HN: Slack decides to close down IRC and XMPP gateways by cornholio on Wednesday March 07, 2018 @06:15PM (#16540879)
There are 36 million blind people in the world and other tens of millions with severe impairments. It seems more like the market is too small due to lack of investment and development.