I think the reason digital doodling hasn't taken off yet is the UIs are too complicated. They are designed for professionals and have lots of ways to do things.

I think the reason digital doodling hasn't taken off yet is the UIs are too complicated. They are designed for professionals and have lots of ways to do things. And the reason for that is we don't have a good drawing layer library yet. If developers could throw together simple drawing apps in a weekend, we could test more interactions and maybe find one that holds a candle to a pen. Remember: it took a long time to develop the modern pen. If we were still dipping feathers in inkwells I suspect this thread might be more forgiving toward digital drawing UIs.