Apart from being broken RC4 requires 256 bytes of state, have a very slow key change operation. And is actually quite slow. Most modern lightweight ciphers req

Apart from being broken RC4 requires 256 bytes of state, have a very slow key change operation. And is actually quite slow. Most modern lightweight ciphers requires much less state (can be stored in registers even), has good key agility. And are faster. So there are numerous technical reasons to not use RC4. As long as you don't have legacy requirements, don't use RC4.