I left Garmin for the Hammerhead Karoo2 (K2) just after it launched. I wanted a better display, better navigation and I wanted to support "the little guy" with the promise of continuous updates and refinements.
Fast forward I still love my K2, but it's lack of Crash Detection, so so battery life (8 hours MAYBE) and the final straw, loosing my Di2 functionality on the unit, made me come back to the Garmin Ecosystem.
Now that I'm back, I have all those things I missed and more plus Garmin fixed a lot of the things that drove me out (Garmin navigation of all things WAS terrible, but it's way better now in rhe1040, but Garmin could still learn a few lessons from Hammerhead when it comes to navigation 
- Garmin PLEASE
let ClimbPeo be enabled ALL THE in or out of a route! This one feature on the K2 that is such a joy! As you approach a hill, it pops up and displays all the relevant metrics related to the climb as well as the total number of climbs you've ridden and all you had to do was press Start at the beginning of your ride 
Note:. Hmmerhead/SRAMS is NOT at fault for loosing Di2 functionality, but rather Shimano having a tantrum and making it's customers suffer... I'm looking at you Shimano 
