&gt; it will be harder for a human to follow than if you use parenthesis<p>Not any harder than following Master Yoda speech.<p>OTOH, following something (say, an English text) (which is heavily parenthesised) may be (I&#x27;m sure there is a lot of references to back this notion) exceptionally hard (even if there is just one nested level (and more levels certainly add more confusion)). Choosing flat over structured often makes a lot sense.