First "forever alone" and now this. Duolingo is very inspirational today. :)
Well, it avoids the Fallacy of Sunken Costs at the very least. I totally should have given up on that old car sooner, but I kept thinking "well, I've already invested so much money in this, it's too late to give up now."
I see the connection, but I'm not sure there is meant to be a positive side to this sentence. Giving up usually, but not always, implies defeat by an opponent (giving in to external pressure). An example of accepting what, in hindsight was a probable end, but what could not have easily been foreseen, like the antique car going to a junk pile seems more like positive "learning experience" - unless of course there was an angry spouse involved...
I haven't tried it yet, but I think this can also be It's never too late to surrender.
Det tilsvarer kanskje Fjellvettregel 8: "Vend i tide - det er ingen skam å snu". I remember that time when the snowstorm started and we wondered if we were close enough to the mountain top to continue... :)