The re-use of patterns across various contexts is great for maintainability and consistency, yet it often encourages the (re)use of a pattern that isn’t fit for purpose. Having a toolkit of pre-made patterns makes it very tempting to cobble together a solution instead of devising something more appropriate from scratch.
Atomic Design in Practice — Does It Work?
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I think this is the whole reason that you can’t have someone create a set of patterns and hand it off. If this was the case, the designers job would be in jeopardy.

In Atomic Design, knowing when to reuse a component and when to make a new component becomes more and more important the larger your library of atoms, molecules, organisms, etc. becomes.

When to add an atom becomes a bigger and bigger question because it often will have a trickle down effect. This causes you to reevaluate if the need is that great. Which in turn helps you realize the boundaries of your current atomic design setup.