I like the idea here, but in my experience the biggest practical issue with postmortems is getting people to actually do them. A heavy term serves as a reminder

I like the idea here, but in my experience the biggest practical issue with postmortems is getting people to actually do them. A heavy term serves as a reminder that it's an important investigation, it has to get done, we can't just put it off until it fits conveniently into the schedule. I worry whether a lighter-sounding term would make it easier for people to work on their projects first and delay post-incident investigations indefinitely.