Seeing the #gamedev community use the word #postmortem to just mean "some post release analysis" is pretty confusing. (Most recently in yathzee's latest #SecondWind video about his startstruck vagabond).
Where I come from, it signifies some rather spectacular explosion in the project. Which always has me worried if I see it show up.
At the very least it is rather cynical and morbid, don't you think?