Unfortunately no update will ever be "big enough" to warrant 3-4 months dev cycles.. :/
But that really is beside the point since you should and will take the time you need, it´s your project so only you can decide. Just as we decide for ourselves if we want to support or not.
Believe me, development cycle time has been on my mind since the very beginning. The truth is, if a dev wants to have a popular game, there's a lot of "pressure" to release more frequent updates:
1) you constantly see people saying they won't play a game before it's at least on the 0.3 release. Or saying "I'll wait a few more updates to see that you're serious before checking your patreon".
2) games are found by players only while they are at the top of the newest released updates. Threads like this are quite active for a couple weeks, and then become completely dead until the game is updated again
3) I don't think players take playtime (much) into consideration when appreciating a game. When my 1st chapter was released I had that reviewer cited above giving the game 5 starts and mentioning 3h of playtime. Meanwhile, another game released at the same time also got a 5 starts review mentioning 20mins of playtime.
4) Players forget about the game, characters, and story after 3/4 months. Supporters might also get upset.
I could have divided the story differently and instead of releasing just 1 update after 3 months with 1h-2h of content, already have released 3 updates with 20-30 mins of content each. I would certainly have gotten more exposured. But I think the story would get too fragmented and hurt by that. I couldn't find better points to make breaks in the story.
Since I have a day job and don't rely on income or popularity from this game, I said fuck it and finished the update when I thought it was a good point to stop the story (and I wanted this chapter to be shorter and be released earlier, but the motherfucker just kept growing).
I think updates of this size are better for the game (and ultimately better on the long term), but I know that it doesn't help me in the short term.
And it won't get better. As more branching narrative start to take place, development times will only get higher. Between: 1) frequent updates; 2) a braching narrative with impactfull choices; and 3) same playtime per update in a single playthrough; I can only pick 2.
I'm not here to fool or trick anyone. I'm considering trying to decrease chapter sizes a bit (if nothing else, it would make it easier to playtest and proofread), but 3 months or more will probably be the frequency of updates going forward.
Just putting this out here so we are all on the same page and you have more information to make any decision about supporting this game or not. I don't have many supporters, and have even less supporters that were there since day 1 like you. The last thing I want is for you guys to be disappointed/unsatisfied/feeling like I lied to you or something of that sort.