Just redefine the scope, or the success criteria!
If the project's purpose was to learn or experiment with X, it doesn't matter that it's not a polished product, it still served its purpose and as such can be considered done.
What is finished anyway? Are projects ever "finished"?
Just redefine the scope, or the success criteria!
If the project's purpose was to learn or experiment with X, it doesn't matter that it's not a polished product, it still served its purpose and as such can be considered done.