I recently acquired one thinking it was going to be a cool and useful feature, and the only time I think to use it is when I brush away a loose cat hair and my cursor goes all over the place. And the tablet mode, I think I used it once as a novelty.
I recently pulled out my previous laptop that I'd used for several years before getting my current one. I don't remember how long I'd had the previous one, but it's been quite a few years.
While working on my project with that laptop I accidentally bumped it and knocked it off my desk. Reflexively, I grabbed for it and managed to catch it by the corner of the screen.
And that's how I found out my laptop had a touchscreen.