This would be a lot more interesting if these folks would release their product/code.
https://www.inkandswitch.com/crosscut/
https://www.inkandswitch.com/inkbase/
are very interesting and promising, but not available for use/experimentation.
https://www.inkandswitch.com/crosscut/
https://www.inkandswitch.com/inkbase/
are very interesting and promising, but not available for use/experimentation.
I'm peripherally involved in a similar project:
https://github.com/IndiePython/myappmaker-sdd
and appreciate anything which could be shared which might be helpful or inform development.
I will note that if you would try either Android or a Windows tablet w/ a Wacom EMR stylus you should be able to get the sort of input you want --- or maybe on a Mac w/ a Wacom One Gen 2 13 inch or Movink 13 or Cintiq w/ Touch display?