Postmortem means after death…
I wouldn't call your game dead immediately after releasing the full version… And your studio seems to be still active, too, according to your closing statement.
Viewing post in EDDA Cafe - Postmortem comments
Doesn't necessarily mean like that. Postmortem games analysis can include an entire outline of the game’s history, team goals, and anything related to game development. It gives the developer more understanding about what things works and doesn't, and hopefully they can learn useful things to be implemented in the future.
At least that's my understanding.
You literally said nothing relating to the use of the word postmortem.
The developer replying to your reply was far more relevant by including what postmortem means in game development; which I was not aware was different than how it is otherwise used; and I wished they replied to my comment directly, but I saw their reply in the end so it ultimately doesn't matter.
Writing project postmortem is a common practice in the game dev community from what we've known as it helps, not only us but other devs as well, analyze what's working and what's not working in the development process. It also signified that the the project's development is done and that there won't be anymore mayor updates in the future.