You have to remember that NLT works on a tight schedule with 2 updates a month. February would then be the hardest month for him with it being the shortest month of the year.
The fact him and his small team is able to:-
Design and write the story
Design, build, render and implement the new areas
Record, insert and lip sync the voiced scenes
Plan and build the puzzles
Plan, design and render all of the animations
Plus test the update on this relentless time crunch is something very few devs can compete with.
NLTs updates are always on time and have very few bugs.
Also the game is clearly built with the steam audience in mind, and SoTS is going to be a huge game one is it complete. And I'm sure he wants to put a great product on steam so he can get the highest ranked adult steam game of the year like he did with Treasure of Nadia. As that's where the big money is.