I won't speak for others, just personally, I'd still wait until a full chapter was released to play. If it was chapters released in parts, I'd feel lost picking up in the middle of a chapter and have to play it from the chapter start anyway.
I totally agree. Even though we're talking about porn games, I find myself way less invested in a story when it's delivered in a lot of small updates. A lot of people agree, to the point where they'd rather wait for a game to finish development before they even play it, which makes frequent updates irrelevant.
Power Vacuum on the other hand has a satisfying amount of plot development each chapter, every (important) character gets featured, and their story threads are often interwoven. Chopping all that up to deliver more frequent updates would undermine one of PV's main selling points, which is the writing.