We dropped whiteboards in favour of collaborative editing of documents. People write their ideas and then comment in realtime. It took some time to get used to, but not many people miss it. Some people got reMarkable if they want to draw something and share - this is a brilliant tool, but unfortunately it doesn't support encryption, so the use is a bit limited, but to draw some flows etc is great.

I completely understand this. I think best through conversation with others involving drawing on paper or whiteboards. Without being able to do this, I can really struggle to focus ideas and plans. Online just does not work as well for this, not for me anyway.