Hrm, I'm actually curious about that. I've had three iPads over the last 14 years; I've never written on any of them. The feature didn't exist for the first two (the first iPad that could use a stylus came out five years after the first iPad, and even then it was only the niche Pro line for a few years), and I never got a stylus for the most recent one.

I've never actually _seen_ anyone use an iPad by writing on it; perhaps it's something that people only do in the privacy of their own homes.