This. I don't see the point of using a Pixel Watch or an Apple Watch or any watch that has 1 or 2 days of battery max.
My 3 year old Garmin has 2+ weeks battery life and is tracking activity, ox (ok, it's not medical grade), sleep, etc.
Also it does _not_ have a mic (something we're going to pay extra in a few years the way things go) and is not connected to anything wirelessly. No need for another device to set it up and you decide when you get data out using USB.