Obsidian has a plug in for this… here is an announcement from the plugin author: https://www.reddit.com/r/ObsidianMD/comments/1bsa6dy/alpha_release_of_my_handwriting_plugin_ink/ (sorry for a reddit link)

Switched from Onenote to obsidian. There was a small learning curve and I had to install some plugins, but I love it. It looks amazing and runs so much faster than OneNote ever did.

I think it’s funny because it’s true. Long form written communication used to convey a lot more subtlety than just its content. It’s a tradition that we will lose a bit like other formalities because it no longer tells you useful information about the sender.