This is the ethos of the blog! And the thing I’m trying to teach my kid to embrace. Like “Strong opinions, loosely held” but for life outside of work:

You can be finished with your project whenever you decide to be done with it. And “done” can mean anything you want it to be. Whose standards of completion or perfection are you holding yourself to anyway? Forget about those! Something is done when you say it is. When it’s no longer interesting. When you’ve gotten a sufficient amount of entertainment and experience from it. When you’ve learned enough from it. Whatever, whenever. Done is what you say it is.

Or as someone else in the Metafilter discussion said:

a project is finished when it’s taught you what you wanted to know.

See also The Crap Art Movement.