I don’t want to be a downer, but I don’t think flashlights will ever improve as much as quickly as they have in the past decade or so.
I’ve rambled on the topic before, but the short version is… technological progress in any given field tends to follow a sigmoid curve, where things improve faster and faster every year at first… but eventually what remains to be done is less than what has already happened, so improvements begin to slow down.
For flashlights, I think we recently passed the mid-point of that curve and are now in the stage where further developments are subject to diminishing returns. I think there will still be big improvements, but… not as dramatic as what has already been accomplished. Like, we’ve lived through a 20X improvement in efficiency, but what remains from here is only about 2X or maybe 3X before it runs into hard limits from the laws of physics.
I think the most exciting times are probably behind us.