There hasn't been a "previous downturn" with this concentrated (size × time) an unemployment spike. It's weird to claim we know now how employers will react to it yet when they see "unemployed, May 2020" on a resume.
Didn't recessions in the US, 100 years ago, used to be huge and always have V-shaped recoveries?
The Department of Labor didn't collect unemployment numbers until the 1940s, but it's my understanding that the recent spike in filings is unique in size since they did.