I have had my Epix (Sapphire, non-pro) since April 2023 and have been using the buttons nearly all the time. I had Fenix 2 and 5 (buttons robust) and never got into touchscreen that much.
The issue that I am now facing is the UP/MENU (left-middle) button "pressed-in" almost completely, has no click and almost no bounce back, making it increasingly difficult to use. Thinking about it, it is likely the button I am using the most, not using touch and having to navigate the menu does that to you.
I have read on this forum that people have been facing button issues previously, some think it is the usage underwater, chlorine, salt etc.
I mostly run, boulder and bike, but have surfed/swam with it on a couple of occasions. The button failure is mechanical and seems to have happened gradually, it lost movement over time.
Have already given the watch multiple baths in soapy/clean water to make sure it has nothing to do with dirt and grime, but that changes nothing. Already contacted Garmin and will run the bath one last time as I was asked by the customer support before starting the RMA process.
But since my warranty will run out soon after I likely replace my watch, I am now worried that it is just a matter of time before it happens again and then I am left with a generally good watch that I will struggle to interact with, if I can at all.
How are your buttons after long(er) term use, if you are using them?