[sph]

Those parentheticals can be rewritten with commas, which sent me on an exploratory tangent trying to see if one could use commas instead of parens in Lisp.

[KMag]

But several layers of parentheticals delimited by commas are ambiguous to parse in the general case.

[spicybright]

That's interesting. What did you find?

[sph]

Like a sibling commenter said, commas are not enough to be unambiguous. Ambiguity is fine in prose, because we can resolve it from context, but computers need something clear and well structured.

[pasquinelli]

you also have dashes for parenthesis.