MacBook Air (Early 2015) keeps crashing

EtreCheck has the ability to provide a summary of system crash events but you need to enable "full disk access". Consult its documentation.

You can find crash reports in the Console app's Sidebar. The Console app is in your Mac's Utilities folder.

I am seeing the same problem with one of our Macbook Air 2015’s, crashes several times per day, started about two months ago. We are running Catalina with all the current updates.

No logging of events in Console under Crash Reports. The computer shuts down on its own, temperature/RAM/everything easy is fine.

I have the same issue, surprised Apple has not started a repair program since this is becoming popular. My MBair told me to run diagnosis, which I did and came back with "there may be an issue with a memory module" Ref Code PPM002. Seems to be that no matter what it will require a logicboard replacement, which isn't really "logical" to replace on a 5 year old mac..... Apple should assist!