Use expl3's parentheses-balanced parser?

[user202729]

Brief outline of the proposed feature

So the user don't need to add braces everywhere e.g. (3+sqrt(4), 5) or \draw[-{Latex[round]}].

Does this sound reasonable?

Usage example

No response

[muzimuzhi]

It's implemented as part of the xparse package, now the ltcmd.dtx module of LaTeX2e kernel (see \@@_grab_D_nested:NNnN), thus is not portable yet.