In some games you can see the dev improve over the chapters of the VN they make.
Do you prefer they continue making new chapters or improve/upgrade earlier chapters?
I prever they come up with a good story, before starting something. Planning is a lot easier, because you know what deadlines you want to reach.
What I see mostly is the lose at least a year, of no real updates, and to be honest, I haven't seen any game finished that half way started to fix the bottom.
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An other game is space rescue code pink, the last few updates, have been fixes and additional in previous parts. They are of course nice, but we didn't get to see the last story fixed, and no new stories either. And we had to restart the game, because the save game didn't work anymore. Etc...
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And intesting take is 'Origin Story (jdor), dev create the whole story before hand, so all the small details, that happen, that we don't understand, but will be come clear in later chapters. No need to revisit older chapters. Of course it still can get abanadoned. I have to say I never saw a company as diligent as NLT, every 2 weeks (2+15 th of a month), a new update arrives, and they already finished at least 3 games that way...