I was going to say; most people I know brought them back for many reasons. One of my Windows fan friends had a surface book 2 and brought it back for repair because of random battery life a few times; ended up buying a Lenovo T470 (I think) instead as they kept insisting it was his fault instead of the glitchy laptop. No issues with the Lenovo ofcourse.
Do you have stats for that? Maybe I'm an outlier, but I loved the Surface Pro so much, I bought a Surface Book for work and a Surface Book 2 for personal use.
The first year was a really bad. Plain and simple. Now it is a decent device, but I'd take a Lenovo today if I had to make the choice. However, for note taking, the Surface Pro is second to none. The form factor, pen, and OneNote is a really good combo.