After the afore mentioned UI overhaul, it will be possible to give more space and prominence to the richt text editor.
The new UI will also have some responsiveness to screen sizes and we consider touch surfaces. But, we have no explicit plans to support actual handwritten notes, beyond what a respective device might support to fill out form fields.
If you want to process images, e.g. to recognise text, I would indeed recommend a Python schema with a “normalize” function. This way you could implement a plugin for processing hand written notes.
We are not sure yet, in how far we will support “photo taking” to upload images. But with rising demand this will become a more and more likely feature. It seems like a almost mandatory feature for proper tabled/phone support.