I still do a lot of writing by hand for work, but it's mostly in my lab-book so there's always the chance I'll spill something over it. I know you can get waterproof fountain pen ink but pencil or biro works as well for what I want, especially when suppliers are always happy to give me new ones for free.
My handwriting is honed through years of conference note taking designed to be as fast as possible but only needed to be legible by me. I know my lab-book is meant to be a permanent record of everything I did so someone in the future can come back and check- I suspect it would take a team of AI specialists to train their model on some of my notes before it would become legible to someone else
, but it's at least there and protected from computer hardware failure.
Interestingly looking through some of my notes the only characters that are perfectly formed are A,C,G and T - years of writing DNA sequences that
have to be right have ensured that