User blog comment:SuperJedi224/An array notation/@comment-25418284-20140109030855

This notation takes an already-existing hierarchy of nested sequences and just reduces them down to a single value. It would be far more powerful (and similar to existing array notations) if simple input gave rise to such a hierarchy. For example, take tritri:

{3, 3, 3} = {3, {3, 2, 3}, 2} = {3, {3, {3, 1, 3}, 2}, 2} = {3, {3, 3, 2}, 2} = {3, {3, {3, 2, 2}, 1}, 2} = {3, {3, {3, {3, 1, 2}, 1}, 1}, 2} = {3, {3, {3, 3, 1}, 1}, 2} = {3, {3, 27}, 2} = {3, {3, {3, 27} - 1, 2}} = {3, {3, {3, {3, 27} - 1, 2}}} ...

See how a simple expression expands to many nested arrays, rising and falling as they expand and solve? Such is the power of array notations.