"More than 150 US colleges and universities have adopted a pass-fail grading system for the spring semester, a spontaneous reaction to the coronavirus pandemic that could bring fundamental change across higher education.
The overwhelming majority of the institutions have made pass-fail an option, reflecting student concerns that work worthy of a top grade should not be lost in a bid to protect them from the challenges of finishing online.
A smaller share of the institutions − including some of the nation’s most elite − have made pass-fail mandatory, aiming to protect less-resourced students suddenly thrust into off-campus situations and traumas that compromise their ability to fully address their studies." …
https://www.timeshighereducation.com/news/us-colleges-adopt-pass-fail-rules-stirring-wider-reform