I do use it. I press it with my right pinky when I want to capitalize letters that I type with my left hand, which is a convention of touch-typing

Yes! When I’m typing in a form where hitting “Enter” acts like a “Submit” button… I’ll use “Right Shift” + “Enter” to create a line break instead of submitting the form.

This also happens with, say, chat support windows. So, not always form fields, I guess.