I learn a lot from most projects, and I think this is a huge benefit from at least starting a project. I then have whatever I learned to use in the projects I do end up taking to completion.
Also remember that most projects are likely to be failures in some way (at least I think this is the case, I don’t have the data lined up to back this up). Once you’ve squeezed much of the learning potential out of them, then it’s likely you’re not losing much, if anything by dropping the project.
A potential way to think about this:
I learn a lot from most projects, and I think this is a huge benefit from at least starting a project. I then have whatever I learned to use in the projects I do end up taking to completion.
Also remember that most projects are likely to be failures in some way (at least I think this is the case, I don’t have the data lined up to back this up). Once you’ve squeezed much of the learning potential out of them, then it’s likely you’re not losing much, if anything by dropping the project.