Tell the time, the date, and act as a stop watch according to the manufacturers website. My $250 watch does all that and it looks better.
I can totally understand buying a nice/expensive watch, they look nice, the feel nice, they’re accurate, they can do cool stuff. I don’t understand buying a watch that costs more than most cars cost, especially if it only does the most basic watch features.
I’m using Linux Mint (Cinnamon) with a 3070. I have absolutely zero issues.