Why not is because they take a not insignificant part of your power: for an endurance ride it knocks the equivalent of 10W off your threshold power, which takes a lot of training to get back. And many people don't do need to do too much night riding on LEL so don't have massive power requirements, plus you have drop bags.
Depends on your objectives, though: if you are neither in a hurry nor in any risk of being out of time, it's not an issue.
Yes, but you're not doing 100% of threshold at audax speeds. I'm generally doing 50-60%.
And it's back up to 5-6 w if you use it for charging in the daytime.
So, to get the same power my Threshold would have to be 10w higher.
Why not is because they take a not insignificant part of your power: for an endurance ride it knocks the equivalent of 10W off your threshold power, which takes a lot of training to get back. And many people don't do need to do too much night riding on LEL so don't have massive power requirements, plus you have drop bags.
Depends on your objectives, though: if you are neither in a hurry nor in any risk of being out of time, it's not an issue.