Kill your darlings
There are a few writers out there who have ideas from when they were kids that they're holding on to do, or from when they first started in comics. They hold on to those ideas so hard that when it comes time to actually do them, they've lost all critical faculties about that idea, and they can't tell if it's a good idea or a bad idea anymore. Then it lands with a thud and this is like, well, yeah, because it wasn't necessarily a good idea. Just because you've had the idea for 30, 40 years and been holding it like some silver coin doesn't mean it's going to work when you actually sit down to write it, because it might be dated, you might have a dated idea. — Chip Zdarsky, Word Balloon Comics Podcast
It's easy to fall in love with our oldest ideas. Especially the ones that live rent free in our heads, while we refrain from turning them into reality because...what if they aren't perfect?
But when we make them out to be something more than they are, more likely than not, we end up squeezing the life out of them. As the writers suggest, perhaps sometimes the thing to do is to "kill your darlings", especially those of the senior variety.