I have white boards for more permanent things. I like this for super temporary things because I don't have to cap/uncap the pen, or pick up a detached eraser to wipe it.
I was shown an ad to an electric note device. You write by touch and erase by pressing a single button. Reviews said accidental writing and erasing happened often, and once the battery runs out there's no way to use it anymore. It inspired me to buy this: https://www.kmart.com.au/product/mini-magnetic-draw-board-assorted-43112357
very useful when I want to write 5 words but don't feel like it's important enough for a post-it. No electricity needed, no accidental writing, quarter of the price, and fall damage resistant.
๐ง