Why should he do that? The people supporting him on Patreon get information on how development is going right now, and might be fine with that. And a story tends to change during development, and if every third scene he releases needs to get reworked so it fits better with later parts its annoying and much worse.Why do people keep giving him money on patreon if he doesn't release updates for more than six months?
He could also release mini-updates with 1 scene after all this time.
Right now you can wait and play from your latest savefile. Otherwise you might have to go back 3 scenes to enjoy the new one or miss out on content, searching for older saves, if you even got them. Some games (like M&B) can make small changes every so often but these games are rarely story-driven.
(Edit: M&B meaning "Mount and Blade" specifically "Mount and Blade 2: Bannerlord")
And if the scenes just can't fit but don't get reworked either the game might and up worse than needed. And just because some people have been impatient. Is that necessary? At least i would say: No it is not.
I apologize for any sort of grammatical errors and/or Spelling mistakes and hope I did not hurt anyone reading this text...