Very hard. Since I was 21 years old I’ve been making a living through typing; for about 20 of those years, as a newspaper reporter, I mixed keyboarding with furious note-taking.
The cumulative effect manifests as numbness, tingling and hands that tire/hurt quickly when holding a pen.
Then there’s the fact that I’m in my sixth decade of life. No machine runs for 59 years without some maintenance issues.
So why not just type those notes? Because they were being sent to people whose opinions matter to me, and I wanted to express my thanks the way Miss Manners would. Of course, she has a staff for that sort of thing.