One tiny mistake can completely ruin that otherwise brilliant 3D-printed PC mod.
As time passes and you accrue more belongings, tech in particular, you may end up with a lot of unused old gear. You could trash it or recycle it the old-fashioned way, or you could repurpose it.
Building a gaming PC is kind of like building a hot rod--sure, the parts that make the car go fast are important, but if you're going to spend all that time on it, shouldn't it look cool, too? As such ...