True. The processor is made of logic, and is always predictable. I rely on that when testing them.

Unfortunately, those pesky interrupts and conditional branches keep occurring, based on asynchronous events. And that is where and when the display gets hard to read.

IF there was nothing else going on, and
IF the code had consistent conditional jumps, and
IF the processor was fast enough to make Erik happy, then
MAYBE you could keep up with a display.