To be fair, right now we've got the development overview "roadmap" and there's indeed a somewhat definied path forward. Of course there's always the possibility to add more and nothing is final, but at least it's clear at which point the game could be considered "finished" and when the "that's actually optional phase" is going to start. One has to keep in mind that it's going to be at least 6 or 7 years by the time that roadmap is finished. So even if the game reaches that point, which I really hope it will, I'm not sure how motivated DC would be to work on SS after that. And that's not even considering any kind of patreon development, which may or may not happen.
Yes there is a definied path forward but with an open end. I mean lets be realistic here. Every update new characters are added. And once that happend in the past people wanted to be able to have sex with (insert number) for said characters. Going by that alone the game itself streches even more.
Then of course we have the main story the side stories etc. If that also gets new side characters we are basically fucked again when DC decides to make a poll/vote for them as well. DC however said he would like to finish this game and see where he goes from there.
We even tried to get him to get once SS is finished to sell it over steam. Maybe he will maybe he will not. But if he does i doubt there would be any need for money in his life again. Would he stop making games then? I highly doubt that but considering some AAA devs making sex games like "Subverse" now over steam the competition is getting pretty fast and pretty high quality.
If SS can keep up then over steam? I have no doubt about it but the question remains where to go from there which SS didnt have already covered?
A female MC? Perspective of a Milf?
Yet considering that there is still some years to go i can't imagine what kind of stuff he will add till then. I mean if i count every side chick there is to be able to fuck and possibly impregnate we talk about 10 years or even more. I mean i wish DC the best with SS but if it gets bigger at the pace it is now over the years i hope people will not lose interest in it.