There's a lot of research that physical handwriting improves absorption, storage and retention of information and helps the brain develop to understand certain concepts and develop certain aptitudes
Its being noticed by educators and psychologists that children who write less and type more are struggling in certain areas, not just English, but it particularly helps with developing the neural pathways that lead to better reading skills and I don't just mean reading as in the physical act but comprehension etc.
It's all tied in with general language acquisition
On a practical/real world level many exams STILL are hand written and if the examiner cannot read their writing they will lose marks however well they know the subject.
I'm a fast typist when I'm at my optimum around 110 wpm but I still find hand writing generally faster and more accurate when I'm making notes while listening to someone speak - a key skill in post compulsory education as it's not just a case of writing what a lecturer is saying but quickly noting a train of thought or something you wish to look up later before the idea escapes you.
But if you physically typed out information on a computer, would it help you learn it the same way that writing it down does?
No it doesn't at all - tons of research on this
It's why there's loads of money being put into improving what's called "handwritten text recognition" or HTR because the tech companies have had to accept that we NEED to write certain things by hand. That it's not just about signing for deliveries and similar, but everyday usage.
We haven't yet got good quality reliable HTR as knowledge of and understanding of handwriting is deeply complex and requires almost a level of artificial intelligence.
Not to mention the language barriers across not only the tech but the developers and programmers themselves as those with different languages have learned them in different ways and have different understandings re language acquisition and usage. It's deeply cultural and varies widely
But even at a simple level look at how even when we type the tech companies haven't even properly solved the autocorrect and American/Australian/british english conflicts! I still get annoyed when a perfectly acceptable word or phrase when typed on something electronic is flagged as incorrect as it goes against eg American English spag rules.
It's fascinating as a subject area though.