I upgraded and I only ride mountain and fat bikes.
Positives:
The flat screen is much easier to see.
The larger screen can display larger font and more data.
The ambient light sensor.
Negatives:
The larger physical size has gotten hit more often when I crash on the mountain.
It seems to have almost the exact same functionality as my upgraded bolt.
TBD:
I really haven’t used the mapping feature for how I ride and that seems to be one of the main reasons to get it.
I think it may have more benefit for road/gravel riders.
If you are mountain biking and cost conscious, the bolt is worth looking at.