Ask HN: Should I take a salary for my pre-revenue startup?

A friend said "no salary" startups succeed less than startups where founders take salary. I can't find any info to confirm / deny this.

My case: My company has no revenue yet. I have enough savings to live comfortably for several years. Raising money takes time from developing the product and also means I give away equity. A salary would probably focus my attention more on the company, but "focus" seems ineffable.

What else should I consider about taking a salary during a pre-revenue stage?