Let me clarify this: I hate unfinished everything, and that's the main reason I'll be ending this quest on the day X, give or take. Also we need to arrive at one of the endings that has any long term per se. Then if I feel like continuing, I'll start a new quest with the number "2" at the end.
But, to be honest, I see the whole R&D idea is reaching its limit, or at least what I can squeeze out of it. That's why I'm considering other options, but let's get back to it after we survive the finale here.