I agree on the over saturation, but that's part of what motivated me to finally get this light done. I've been thinking about it for several years, but haven't had the time to dedicate. I realized I wanted to get it out there before the moment passed
I've also seen a lot of dubious engineering decisions in this category. Don't worry, this is normal, but like the Alpha, I think there is room for a well engineered tool. Good flashlight engineering is about understanding heat: how it's generated, how it moves, and what to do with it. A designer may not care and just go for more horsepower. Okay, but I'm not the kind of person to put a dragster in my pocket...or someone else's. The Detla is a balanced performer for real life and real use, not for shooting UFOs out of the sky
For me the main technical advantage of (specifically) a triple revolves around very compact optics. Since it has such a short overall height I can trade that space savings for thermal mass, which is a significant limitation on a small light And the reason the Alpha has a large head...lots of thermal mass...meaning you can actually use the light on full power. The Delta is longer than most 18350 lights. Some of this is ergonomics and some is engineering. Just because you "can" make a light smaller (or brighter) doesn't mean you "should." The Delta is still too small to absorb 3.4A of heat for more than a few minutes, but the 70% high mode on the Icarus driver handles this nicely. There is almost no reason to run the Delta (or any other 1K+ lumen light) on full power...unless you hate batteries
Thermal performance is another reason the copper pill is exposed, rather than housed within the light. Heat can escape to the environment (or your hand) without going through another thermal barrier. This also allows us to use 6/4 titanium without the significant thermal penalty of that material. CP2 titanium has 4X the heat conduction of 6/4, and that's why I use it on the Alpha.
I'm also going to be using graphite thermal pads, which AFAIK is an industry #first. So far (based on empirical measurements) graphite seems to make a significant improvement in lumen maintenance from turn on up to 30 seconds. This is bordering on "looks good on paper but doesn't matter in real life" but that will continue to be assessed.
The Delta is compact, but should still have excellent thermal performance for the reasons listed above. My goal is to always make usable lights. I make tools, not toys.