I'm not sure what you deem as "sufficient", but there certainly are studies suggesting that handwriting has some benefit over typing w.r.t. learning and memory

I'm not sure what you deem as "sufficient", but there certainly are studies suggesting that handwriting has some benefit over typing w.r.t. learning and memory [1]. 1. https://www.scientificamerican.com/article/why-writing-by-hand-is-better-for-memory-and-learning/ https://www.scientificamerican.com/article/why-writing-by-ha...