I have been wondering, I think I read/heard/dreamed something about that they could change the color of the LED on the watch with software, and was wondering if a Series 5 watch, or maybe even WatchOS6 would have the capability of reading SPo2, either with existing hardware, or in perhaps a new watch series. Seems other companies have started to realize the importance of this, and kinda would like to see Apple follow suit. Anyone know/heard anything?