I’m one of the runners that has lost zero nails, and thats with running marathons up to 100k distance since 1989. Good fitting shoes(most wear then too short), socks and proper electolyte balance can help. I’ve had a few black ones though.
That’s hilarious–I just lost my first as well! It’s been bruised for about 2 1/2 months after a half marathon. I knew it was going to happen, but it’s still kind of a weird feeling to have the first one gone of the season!