Assuming by "jutting pieces" you mean the pins, yeah, I could see that being difficult ultimately to manufacture into the 3.5mm jack configuration.
But translating each pin to a "band" (sorry I'm not very technical myself) on a jack with the form factor of a 3.5mm pin should be doable. You'd probably need 5 or 10 bands since (as I understand it) USBs use a 5 pin connection (again, as I understand it, most devices mirror the 5 pins on each side, but some more advanced/specialized USBs utilized the USB-C connector as 10 pins, hence the possible desire for a 10 band jack).
Again, I could see that being difficult to manufacture, but not impossible, and especially if it became a standard package. Might need a bigger jack than 3.5mm though.
Naw, we should have used 420 to ensure we can also cleanly divide by 7.
Maybe even 1260 so we can fit a division by 9 in there (420 already has 3 as a prime factor, so only need to go 420 x 3 to get a clean division by 9). I suggest ending there since we could divide by everything up to our number of fingers.