@fallenchemist If we are limiting the concept of “curving” to the more traditional process of fitting class grades into a normal distribution and assigning grades accordingly, then I really don’t know any professors who grade on a curve. I know that curve has also come to be used commonly to describe scaling exam results based on the overall grade range, e.g. making the top score a 100 and scaling the rest accordingly. I don’t know any professors who grade using the more traditional meaning of curve above. I do know a few, but not many, who use the second “curving” method to assign grades.
More common (in my experience) is setting a grading scale at the beginning of the semester (e.g. the 10-point scale) and saying anyone who meets those score ranges is guaranteed the grade assigned to it in the syllabus, while reserving the right to adjust the scale accordingly (usually to make it more generous) as needed. That is far and away the most common method used by most that I know, and it is typically the one I use. It is basically saying “if you, the student, demonstrate a certain level of mastery of the material, you will earn the appropriate corresponding grade regardless of how your classmates performed.” If, at the end of the semester, it seems like students really struggled overall, it merits me going back and looking at the exam problems I gave, and if it looks like they were too difficult for what I was trying to assess, then I always reserve the right to go back and make the grade ranges larger or to shift them to make the scale more forgiving.