I mean live as if there's a reasonable chance that you'll die in ten years. But even so, do you get no intrinsic satisfaction from the work involved? Is there no-one who could continue the projects if you died? If it's 'no' to both questions, then maybe you should stop doing them anyway.
There are always tradeoffs. I get intrinsic satisfaction from the projects. But I think both about the short-term and long-term. If I expected to die in 10 years, I'd do different things, because the balance of costs and benefits would work out differently.
