That's because they have been gaslit into thinking this is still coming out next month. Nevermind the fact more than 36 months have passed since that promised update.
This is more or less a means of getting attention. Absolutely no motivation to produce anything, so he now just lives out some fantasy on the Patreon page. Funny thing is people sign up for the game, not to hear about random BS he does in his daily life not even related to the game every month for years. Neanderthals might enjoy hearing about it month after month, but I for one could care less. Certainly not going to follow it for years and years.
Can't wait? Well, they've all been waiting nonstop for over 3 years. Seems to me they can wait for it.
What's another year or two gonna hurt, and then check and test on what you've already waited for another year. Then get started on the Godot engine or something else irrelevant in an attempt to detract attention away from the fact you're not even touching the game for another year.