FYI, from what I can gather it is absolutely not cancelled, although almost definitely placed on hold (in terms of releasing updates, not in terms of development). Dev, understandably, could not handle with how most of you guys act like 12 year old children in terms of how spoiled and inconsiderate you are regarding a product 90% of you do not pay for.
Dev works on other games, don't expect an update on this until he has completed either the full game or some substantial portion of the game. Since the start he has explicitly stated multiple times that this project will be the third priority for him, given he started first on the other two games and hundreds/thousands of people pay him for the progress promised on those two project. That is, he has always stated work/releases on this project will be irregular and will be subject to when he is not working on the other two projects that take precedent. Will not be published in the same version by version process as other Nergal games; mostly thanks to those in or from this thread who have the patience of a pre-teen.
I've gathered this perspective from his patreon, his discord, and his interactions here. Big thanks to those that have fucked it all up for the rest of us.