Hand coding can drastically improve performance if you know what you're doing and the compiler is doing a poor job. That being said, Intel is deprecating its AVX-512 support since it wasn't worth the silicon. AMD on the other hand did a much better job of it.
First, monkeys can type faster than one character per second. Second, if you're going to make it "real world" then you have to consider the lifespan of the monkey, which is probably at most 40 years?
You don't really need to wear the watch every night to check for sleep apnea. In fact, I'm not too sure the value of this feature honestly. You get diagnosed, treated (usually with a CPAP machine) that's it. Every year or so you're supposed to get rechecked to see if the machine needs adjusting. Not sure how the watch really helps here.