I’ve definitely learned that all things need to be applied and used in practice, not just swatched, because a swatch only tells part of the story. Sometimes the swatch is better, sometimes the swatch is so-so, but the product is infinitely better worn as intended. Having said that, I would say that half-way through wearing a product, I have a good idea where it’s going to land. If something is really bad, I don’t usually go back, but if it was so-so or maybe was paired with the wrong products, bases, etc. or my skin wasn’t in the right shape, then I will try it again.