There's one thing Garmin is leader (expected to be): navigation algorithm.
This ETA projection feature used to work on old sw version then the regression come in.
How is that possible? What's wrong?
The wrong behavior is that you are like 4km away from your final destination and you have a "Time to destination" saying that you reach the end of the course in like 3 minutes (which is totally wrong) and counter goes down to zero, then goes up again on a random number.
Garmin-Sierra are you actively working on this bad issue?
Why is that hard to solve? ETA of ETA feature fixing?