> By thinking of Pd's lists as equivalent to Python's tuples I was
somehow forced to think parentheses, but yeah, curly braces wouldn't
break anything for sure.

They would break the inter-process message parser. Also, the curly-bracket filter

would need to be removed from the key eventhandler in g_editor.c. Plus

any other places in m_binbuf.c or other places where curlies are filtered.

-Jonathan