This type of article makes me guffaw. The primary operational changes to the Apple Watch Series 4 related to falls (only available if you’re 65 or older) and atrial fibulation (test can’t be run if you’re 22 or younger). With those constraints in mind, here’s the earth shattering article title that got me laughing:

https://www.appleworld.today/blog/2018/12/13/health-features-in-smartwatches-like-the-apple-watch-series-4-appeal-to-older-americans

Health features in smartwatches like the Apple Watch Series 4 appeal to older Americans

December 13, 2018/ Dennis Sellers