I had some real hang ups about coming back to a Fenix after I moved from my Trusty Fenix 3Hr to an AW4 Cellular. I'm 54 and my eyes are borderline needing reading glasses, and the screen on the Fenix 3Hr was a bit too small, dull and hard to read at times. So, I tried the AW.
Let me tell you, for a year I simply LOVED the thing. So why did I bother switching? Here you go:
When I started swimming laps and doing Aqua Fitness, I always had to lock the AW screen with the water lock. So in essence, it was just a display and that's it. You cannot interact with the watch. Boy was that annoying. You cannot leave the touch screen enabled when in water, it's a disaster.
The short battery life. It wasn't a bad adjustment considering all of the things I could do with the watch. I would get about 1.25 days which would include sleep tracking about about 3 hours (only running using the GPS) of exercise activities. But, if I forgot to charge the watch in the morning at work, I had to find time to charge it before my afternoon routine, or I was dead in the water.
The cheap build. The thing felt light, cheap and like a toy on my wrist. I missed the rugged build of the Fenix. BUT, surprisingly the AW is a well built watch. I never took it off. Also liked that I could wear a magnetic loop band. I cannot wear one of those with this Fenix 6x Pro. It wouldn't hold it, and it would look stupid.
I miss basically having the whole Apple ecosystem on my wrist. I often just left my phone at home. For a whole day. I just didn't need it. I could respond to inquiries, call people and the sound quality was fantastic. The Bluetooth on the watch is second to none in range and ease of pairing. The screen on the AW is very bright and easy to read. I didn't have any items on the device that I had to do the "OLD MAN" squint to read.
I miss the ability to set a larger font.
Now, having the Fenix 6x Pro with Gorilla Glass has made a world of difference. The Sapphire, while strong, dims the screen and makes it difficult to read for me. The glass is nice. I can read things very easily without having to use the backlight at full brightness. I run it at maybe 30%. I only get about 4 days battery life, but that's using 3 hours a day workouts, Everything enabled 24/7. 4 days to me feels like an eternity.
Over all I ONLY miss the connected features of the Applewatch. That's it.