the comma demands innovation. here are some of my proposals
anti-comma to indicate the semantically loadbearing omission of an oxford comma. E.g.: I invited my mom, a priest [anti-comma] and a large insect. ([My pious six-legged mother, NOT [my mother, and a priest, and a large insect])
layered commas which allow for better clarity in elaborate clause structures that necessitate nested commas, such as parenthetical commas within a list, listing commas within a greater list, and appositives within a parenthetical.
E.g.: There is warm, wet rain on him, on you, soaking though your pants to your skin, and on the wall, dripping down the brick. -> Weighted commas: There is warm, wet rain on him,, on you, soaking through your pants to your skin,, and on the wall, dripping down the brick. Semicolons do this, but they are only one layer. Consider: There is warm, wet rain on him, the beekeeper, John, though barely; on you, soaking through your pants, which you got for $3 at a flea market, and which leak dye, shoes, and socks, to your skin; and on the wall, dripping down the brick. -> Prototypical comma layering to indicate which commas weigh heavier (semicolon still heaviest): There is warm, wet rain on him,, the beekeeper, John,, though barely; soaking through your pants, that you got for $3 at a flea market, and which leak dye,, shoes,, and socks,,, to your skin; and on the wall,, dripping down the oily, grey brick.
variation on layered comma, instead of making heavier commas we make lighter ones -> There is warm' wet rain on him' the beekeeper' John, though barely; soaking through your pants' that you got for $3 at a flea market' and which leak dye'' shoes'' and socks, to your skin; and on the wall, dripping down the oily' grey brick.
recursive comma, which indicates where a comma is referring back to, similar to musical repeat signs: Rain soaking through your pants,>,> that you got for $3 at a flea market, and which leak dye,< shoes,< and socks,<,< to your skin.
languid comma to indicate,-------, a decorative sort of pause
triple comma chameleon,,,🦎 to indicate a comma-enclosed clause that much like the rotating eyes of a chameleon can apply either backward to the preceding clause, or forward, to the succeeding clause to derive two additional and intentional meanings,,,🦎 a feature pronounced 'comma comma comma chameleon'