Do you mean acceptances of students from the high school Class of 2020, accepted into the college Class of 2024?
I think that colleges would be well-advised to be very liberal about second semester high school GPAs under these extraordinary circumstances.
If someone applied to and was accepted to prestigious college with a 3.85 GPA unweighted and that plummets to a 2.1 this semester, then sure, the college could rescind that admissions offer, on the grounds that that is QUITE a senior slump.
But what if the family of the student who got rescinded went public? What if they explained circumstances like noisy home life, small apartment with lots of siblings, spotty wi-fi, severe emotional stress and depression based on the extreme isolation, depression based on losing extracurriculars and prom and graduation, deaths in the family due to coronavirus?
Rescinding a student who is spiraling with sadness in the face of a national crisis would make a college look like it lacked empathy.
So while I would say we should definitely encourage our Class of 2020 kids to continue to take their academics seriously and do the best they can, I also expect colleges are going to be more sympathetic than usual. The PR cost of being strict would not be worth it, in my opinion.