I think that's possibly one of the main problems with grades and why they inevitably lead to the grade inflation crisis. From the article:

> In May, Harvard University faculty voted to approve a 20% cap on the number of A’s per undergraduate course in an effort to curb grade inflation. It won’t apply to A-minuses, which committee members predicted would become the most awarded grade.

> At the University of Michigan, a review by the news site MLive found that 74.1% of all undergraduate grades in 2022 were an A+, A or A-. A decade earlier, that percentage was 57.6%.