I've easily spent more time at whiteboar in interviews than at a white hard in all my time on the actual job, over many years.
A good design discussion is written up and discussed. Ad hoc scribbles on a board don't add much anything, not in the 21st century with good computer drawing tools
I get a lot of work done at a white hard with 1-3 coworkers. We reach a consensus there, and then you formalize and write up the design and break out lucidchart or whatever.
It's not worth spending time making a design when you're going to forget something important and have to rework it. Use a whiteboard until you're confident you aren't going to erase again, that's my rule.
A good design discussion is written up and discussed. Ad hoc scribbles on a board don't add much anything, not in the 21st century with good computer drawing tools