I've also been using the iPhone XR for over a month now and it's fine for me in terms of PWM. I definitely agree with you on the weight/size. The XR introduced a new issue for me, my thumbs are sore due to the "swipe up" gesture. So, I'm really going to need to be looking at a new device as this one isn't going to work long term for me. However, it seems like currently for those of us who have PWM issues, there really aren't good options out there unless we want older devices.