I recently upgraded my garmin gear. I was an original fenix 3 HR owner with the sapphire glass. It served its life well and is still alive and fully functional! The main reason for upgrade was the battery life was deteriorating.
I debated for quite a while on which model 8 to go with and ultimately chose the AMOLED display in the same 51mm. I’m blown away with the performance and options this new piece of kit has to offer. It’s a learning curve with the new features and apps this can handle but it was a worthy upgrade.
To note. Most of my long thru hikes last a few weeks max. My runs are 10k in the woods. And I’m normally close to civilization or carry a charger. But I have yet to need to charge this thing until I get home. Even over 14 days while using the tracking when set up correctly I made it home wi the at least another 2 weeks of life left in the watch.