[Hermel]

Sometimes, re-inventing something is easier than trying to find it somewhere else.

[civilized]

Re-inventing can be good for your personal learning. But if you're building something that others are going to have to deal with, those others will usually be better off if a classical solution or approach is used. The classical solution will usually be less buggy and better explained than whatever you roll for yourself.

[Beltalowda]

Or sometimes, what already exists is "okay" but not all that great, and by "reinventing" it you can improve on things.

As with many things, NIH is a great attitude to have in some cases, and a horrible one in other cases. Being mindful what you're doing and why is key.

[tbrownaw]

Bicycle wheels, airplane wheels, and office chair wheels are all pretty different for pretty good reasons.

[ectopod]

And a lot more fun.