I remember as a child, I would often have a SAK, a handful of quarters (for payphones and vending machines), and a Mini-Mag Solitaire in my pocket. When I went off to school, I kept a black Mini-Mag AA in my desk. At the time, one of my housemates had a Surefire Z2 (it was amazingly bright for it's size), and after graduation, I ended up buying one myself.
Some years later, white LEDs came to market (Luxeon, I remember), and the cool white light was almost magical to me, but it did not quite replace the warm light from incandescents. Now of course you can find warm tinted LEDs (To my eyes, some of HDS custom offerings 3000K/3500K are very close to a Z2 P60 Xenon)*, and I do use LEDs more often than incandesecents, but I still pick up Z2 on occasion. Part of that is certainly nostalgia, but I find the visibility of objects using a P60 Xenon to be excellent even though it is not as bright as most modern LED offerings. It's a little bulky for me to EDC, but in addition to other lights, I do keep a Z2 in the car.
*Proper engineering (optics/electronics/reflector) seem to make a big difference. Even though the P60 is only ~60 Lumens, and the warmer HDS LEDs are "only" 180 Lumens, I can just see better with them compared to some brighter LEDs.
