Another good indicator is looking at the long term fixed wheel cyclists and people that ride these kind of bicycles either for work or just get plenty of mileage otherwise.
Look what they ride on the street. Count how many ride with clips and straps then do the same for clipless. It is not for fashion, the choice is based on sound reasoning.

Clipless might superior and more convenient for roadbikes and mountainbikes, but is you ride them on a fixed wheel on the street you are really asking for it in my opinion.