I like the unique form factor. Make this usb C rechargeable too and easy to mod and I will buy some.
Pretty good idea. I would engineer flashlight to accept ” duel fuel ” cells. 18650, 16650, CR123A, RC123A. Release regular and limited editions like copper, titanium, etc….
Did not Klarus and Fenix do something like this?
Klarus RS30, Fenix L50 from a few years ago?
I like this idea!
I have a RayOVac 2xAA side by side sitting on my workbench right now.
I used these little 2xAA side by side lights as backups for cave crawling when I was a kid.
I recall some past discussion of these at BLF, somewhere.
Those Duracell lights have the nostalgia factor built in. In a good execution with a sliding switch for off to brightest and decent waterproofing, they would sell in my opinion. Warm tint would be a plus!
Keep it simple, 2X AA powered for one model, see if it sells and then come out with a rechargeable version with built in 18650 and charging port.
We had a Duracell Durabeam in one car or another for years. Till one day the batteries leaked and destroyed it. When it gave up its ghost no other durabeams of the same vintage could be found. 
Yes it was easy to use and hold. Not to large or small. Not expensive or cheap. Maybe a updated version would be nice. Can not beat a basic on/off switch for ease of operation. Maybe it is time to 3D print some new examples. I have not acquired a 3D printer of late.
I used to have one of these! Must have been more than 30 years ago.
I like the Nitecore MT22, it is cheap, has a simple and functional UI, seems bombproof, and I personally am very ok with the switch on the back. I do not easily see how Sofirn can improve on it, except placing the switch in a different position.
Wow, someone other than me likes the old AA Durabeam. I got one of those Duracell flashlights as a kid for Christmas in the early to mid 1980s. I loved it, I put it in my mouth when bicycling home at night as a kid in areas where there were no streetlights, it was my first EDC. What a great memory.
The old Duracell and RayOVac lights had different plastic shells but the same innards.
I like it and support your idea. I had a Durabeam when I was young.
Maybe keep it simple.
Wouldn’t that make it your MDC?
I like the Nitecore MT22A light as well. Get rid of the strobe, and put a nice NW emitter in it. I was going to buy a few of the Nitecores for the kids while camping, but the strobe function in the main mode group killed the deal for me. Didn’t want the kids strobing in the campgrounds.
Simple 4 mode, water proof, tail stand, and inexpensive.
Wow, blast from the past! I had one of these as a kid, and I loved it to bits, first torch of a reputable brand that I’ve ever had. It rode in my pocket a pot and saw relentless use until the host’s plastics cracked too much to hold the black casing in place. When it gave up the ghost, the switch’s tin plate was oxidized, the reflector was more cracked than a boiled egg before peeling, and certain sections of the brown plastic were beige from elastic fatigue.
If you ask me, two LEDs (liked the “one flood, one throw” idea) driven to produce about 15-20 lumens each, with only one mode. That way a slide switch can be used and muggles will love the simplicity. And no, it should be all alkie or NiMH, no going fancy with battery formats, save that for a special model.
This may became interesting. It seems most of serious players on flaslight market already discovered advantages of rectangular section host. On the other hand I hope the beam will not have any visible rectangularity.
This could become an interesting project.
Why in this age of almost endless inhome possibilities look for cooperation with established manufacturers. BLF has members with 3D-printers, and skills in AutoCad or what ever sofware you need for a 3D printer.
Use the search function 
Ahem, my name won’t be popping up, because I posess no useful skillset.
I have the Nitecore MT22A and I like it quite a bit. I wouldn’t care if it supported 2*14500 or not. The output possible for two AA is impressive now. That Duracell was my first flashlight as a kid. I kept it in an old army knapsack with extra batteries and an extra bulb in a medicine bottle. Good memories!
I like the idea, would surely buy one or two…