So now we just start believing that when dev says he is hoping to release by end of some month or 1st week of next month we consider it as end of the next month according to your logic!
It's not my first time but I have seen renpy game devs like perfect housewife,project myriam etc devs taking efforts and pushing updates with quality I can assure you in span of 1 month an even they say they hope but gradually release in 1 month span
Well yeah, if you're assuming that it's going to be released on a date, when the Dev has clearly stated he MIGHT release, if everything goes according to plan. Then I think you're being overly optimistic. The problem is, if a Dev tries to be optimistic and gives a date he's not entirely certain about, to please his most impatient fans. They all take it, like he was giving a cast iron guarantee to release on that date. I've lost count of the number of times, I've had to remind people of this, on this thread. Who never read the Devs posts properly, and just seem to see what they want to see.
You mention Project Myriam. It's a great game, one of my favourites and Zorlun does an amazing job to release updates every 1-2 months. But it's far less complex than this one. As a sandbox game, with a phone function, which is heavily integrated into the gameplay, the devs have created a rod for their own back. Because they messed up during early implementation of this function, which now causes issues in every update that is released (which is why old saves are often so problematic). Zorlun doesn't have to deal with any of this, because his game is so much simpler in form.
The other main difference, is that Project Myriam doesn't have any animated scenes. And animations can take a long time to get right. The current problems that the Devs are dealing with, are likely entirely down to the animations, which Deep mentioned in an earlier update. So it might appear to you, that other game Devs can release much quicker than Deepsleep, but without the right context, such comparisons are meaningless.