I'm confused about the line "Selfdogfood instead of email." I followed the link to get an understanding of the concept of selfdogfooding, but am not sure I understand this binary opposition.
Ultimately I agree with the ideas here, even if they require a little unpacking. A lot of great things have come about from people solving their own problems first, later realizing that other people experience the same problems. Evan You's initial work on Vue is a good example of this: he created it to solve actual problems in his own work, not to solve hypothetical problems on day one.