The mystery of Rails' `lib/` folder (simplexity.quest)

I've encountered a lot of confusion on this topic and hope people find this article helpful.

Also if you find any mistakes I'd be happy to correct them!

I feel like this varies a ton from company to company, but this feels like how it should work!

Good, short call out to a solution to a common pain point in Rails apps. Helps improve the design of existing systems with very little effort. Great contribution to the community!