I'm with you in that I will probably not use this (the auto .gitignore reading freaks me out). Another elitist aside: I can usually tell that I won't want to use a tool when it has a mac os install option first under the downloads section on its page.

That said, the good thing about open source is you don't have to use it. I imagine the opinionated choices they made are popular amongst that crowd who seem like the types who mainly use the terminal to code--hence the .gitignore awareness; so, I imagine it's ok for others to use it if they find it makes themselves more productive for what they do. But, the good news is fd won't become a default anytime soon for that reason, so I have nothing to worry about this affecting me.