Big things for me:

Leave house without phone or wallet. Can still make calls and pay for shopping.

Sleep tracking

Heart rate and ECG i check at least once a day

And when driving, the watch reminds me that a turn is coming up. Useful when driving for hours .

Long shot question - but have you had any medical imaging with contrast lately? Like a CaT scan or other nuclear imaging? Maybe a long exposure chest/lung xray?