I am out of my depth here, but I do not really understand why this matters. Could you elaborate? Basically, I understand that shifts for incoming serial bits i

I am out of my depth here, but I do not really understand why this matters. Could you elaborate? Basically, I understand that shifts for incoming serial bits is very convenient. But as long as you specify the "word size" used in your local memory, I do not see the problem: just use 8 (for instance) shifts for your 8-bit word and then go to the next memory location. Why is this fantasy wrong?