Each to their own, of course…but I’m sure that anyone as good as you (and all of the other folks in this thread) has a pretty good ear for music, so I very much doubt that any of the ideas that get binned are really a “shile of pite”
Quite possible that the songs (or at least parts of the songs) would be of value to somebody else who could expand on them…but who knows?
We could easily set up a soundcloud account for the specific purpose of being the songwriter forum orphaned ideas depository account, if it got any traction.
Anyway, to answer the original question, I fairly quickly dump an idea that’s not going to work. Sometimes, I’ve had to try and make something work, which is possible, but a fresh perspective from someone else could save it from being dumped in an unmarked grave. That would be a shame, really…as the writer must have thought it was promising to even bother powering up their DAW and starting work on it.