Tapas novels have odd limitations on image dimensions, and because I couldn't make my images bigger than 400 pixels wide I dropped my project I was extremely excited about beforehand . Fortunately, I was only 7k words in, with 20 illustrations / panels. As opposed to much farther. It turned out well, because I made a different project that will be a comic, and I've never been so dedicated before!
There's been many instances where I changed something inside a project. In my passion project, I have several main characters. I'd change something about their hair color or something which would then change everything else about them to make it work, making detailed illustrations of them redundant. Or I'd have this one scene in my head that I think. 'I HAVE TO HAVE THAT!" and I refuse to let ti go no matter what anyone would tell me. I change other things to make it work, even though some other scene may have technically worked as well, but isn't to my personal taste. It's all about visuals and how it plays out in my head. This is recurrent for my designs of everything and anything and anyone, be it people, creatures, fauna, planets, etc. I'll even end up having to change some lore, or make something a bit more complex to explain how the new change exists, all because I just didn't like the visuals before. It thus ends up undoing a bunch of my work--I've definitely lost over 200 hours to these kinds of things.
But I've got full control of my own projects, so I will change them for any trivial reason I want!