I think peak incan was around 2005. After that LEDs took over so quickly nobody kept developing them. M6, Magcharger, and SL-20X were all fairly bright stock and you could easily get upgrade bulbs for them. Mag's was unofficial but it still worked well. People also forget the Tiger Light. Think that was the last new incan police flashlight to hit the market. Shame the company turned into a meme. I think it had potential.
The Magcharger was waaay ahead of its time, but keep in mind its time wasn't competing against Surefire in the 2000s. When the MC came out in 1982 your primary-cell alternative was a PR-bulb flashlight using technology that hadn't changed much since the 1930s. The Mini-Mag wasn't even on the market. The MC's
direct competition (I'm not counting the contemporaty rechargeable conversions that still used PR bulbs) were a couple other halogen rechargeables that used nearly the same battery, bulb, and charger. Performace wasn't much different but the MC was decades ahead in phsyical engineering. Mag traded blows with Streamlight back & forth while the other companies went out of business, until SL started pulling away with product improvements. Then new models like the Stinger in the '90s. Enter the next two decades of Mag not doing...anything really.
Streamlight's contribution to history really doesn't get the respect it deserves. Mag had the quality, but Streamlight had the technology. Around 1980 you're shopping for flashlights and it's a sea of PR-based D/C cell lights from half a dozen brands. Then Streamlight has three size ranges of halogen rechargeable duty lights, a rechargeable spotlight lantern, and essentially a proto-Surefire Hellfighter HID that cost as much as a used car.
Surefire seemed like it was heading in the right direction with the 9N. I don't think it got over being kinda clunky and expensive, and the Stinger completely thrashed it in the market. As far as I'm concerned Surefire gave up on duty lights when they came out with the 9AN that got rid of the 9N's cradle charging ability.
It just immediately became standard practice by pretty much everyone who owned one or was issued one, to leave it on the charger when not switched on and being used.
Well, the whole selling point was you were expected to have a charger on the center console in your car or office with all these things.