Apple Watch 4 & self monitoring

I'm running out of things to work on with longevity so am going after miscellaneous leftover improvements this year such as self monitoring and physical safety. On that I got the new Watch 4. I was an early smart watch adopter, but judging them as too early have waited until Apple could mature the platform enough to be useful, which I think they did with the 4. I haven't had it long but am pleased to report it is a useful tool for us longevity enthusiasts. Specifically

• Always having a LTE connection in case you get into any sort of trouble (my phone isn't always with me)
• The heart rate monitoring is great! 
• EKG is coming end of year
• They have a patent to estimate blood pressure using EKG and heart rate, possible app addition here
• The exercise reminders ('close the loop') really works. I'm on the computer all day and it really does encourage me to get up and move around more. 
• I have a hydration app running on it - as I've gotten older my wife and I have found that hydration gets more difficult - having this app really helps. 
• The exercise session monitoring works great
• There's an air quality monitoring app built in - great for keeping an eye on the air quality when going out (I have hospital grade air filters in my house). Maybe not a good idea to go out for a run on a bad day. 
• UV index build in - same thing
• There's a mediation app - I use the Muse EEG headset, but this actually is useful when I get steamed at some bit of recalcitrant code. 
• I'm hooked into the local emergency response system text messaging - so I'm aware of any wildfires or what not going on 
• My health care provider has a Watch app which is useful
• Fall detection in case of a patch of ice, banana peel, or just getting old
• The Apple Health app on the phone is a great aggregator for all your health information, I'm putting more and more into it as the one stop aggregation (I have a BP cuff and weight scale which feed into it)

So, recommended. highly useful for folks like us.