> I've worked in software for > 20 years. I've been a tech lead of a few projects that shipped and YOU likely use in your daily everyday life. Outside of interviews, i've had to use a real-life whiteboard ... twice ...

That's neat! I hope you don't think your anecdotal evidence discredits my own anecdotal evidence about how useful they are. People use different tools and I'm guessing you're not intending to say folks that have been productively using whiteboards for decades are somehow wrong.