I don't do whiteboard coding. When I thought it was meaningful, or might be meaningful, I did it even though I'm uniformly terrible at it. If I was great at it, I might do it even though I no longer think it's meaningful.

But I'm terrible at it, and I don't think it's meaningful, so I don't do it. Admittedly, it costs me some opportunities, but mainly at companies I'm not sure I want to work for, anyway.

At this stage I'm an old fart with a long resume, and more often than not I get hired by people who already know my work. I guess if I was as bad as my whiteboarding performance makes me look then people who know my work wouldn't want to hire me.