When I said "you" I meant "the developer" not "the user": the class of devices that run C and not JS is also a class of devices that generally don't run third p

When I said "you" I meant "the developer" not "the user": the class of devices that run C and not JS is also a class of devices that generally don't run third party code. If you aren't a hardware manufacturer (or trying to sell middleware to one) the fact the embedded systems run binaries that were programmed in C isn't in any way relevant.