Since those sensors are say 20 years old design and 16+ years components, its safe to say that their precision leaves a lot to desire. No gps for example to hel

Since those sensors are say 20 years old design and 16+ years components, its safe to say that their precision leaves a lot to desire. No gps for example to help triangulation or indicate position. It all may be great for you but depending on your activities one may appreciate higher precision / more capable instruments. That being said, I used to wear some old Suunto that are probably even worse and I had to switch battery every few years. I didnt mind being 100-150m off in altitude for example in some himalayan treks or skitours in alps since terrain navigation was easy. Stopped with them altogether, for weekends phone is vastly superior and battery is no problem. And since kids I dont do much more situations that actually use such watches.