Great comments here - right on target about the value of LENR.
I had the same experience with fireworks. I like an 8 second exposure timed with launch, and LENR caused me to miss some nice cycles of fireworks. LENR does not work when you need short duration between images.
Another place to be careful about LENR is with multiple exposure images. I often use multiple exposures in lieu of long exposures. For example, with moving water I might use a series of 5-7 two second exposures rather than one 30 second exposure. The time between exposures for LENR to work can reduce the smoothness of the multi-exposure image.
This also applies to interval imaging of any type when the exposure is more than 1 second.
Another place to avoid LENR is with star trails. There are two types of star images - short images to capture stars as dots (typically under 30 seconds using the 500 divided by focal length formula), and long star trails with an exposure of an hour or more. With the former, LENR is fine. But with star trails, you would have to wait an hour or more for the LENR black frame image. In some cases you might have 3 hour images - completely unacceptable for a second frame as battery life becomes an issue.