For home lighting I have a mixture of incandescent, fluorescent, LED, halogen, and a few that don’t require electricity. For low power consumption, longevity, and little heat – the LED’s win. As the larger fluorescent fixtures die, I’m replacing them with LED units. I have some halogen fixtures over my loading & work benches, not because they are great but because that was cheap at the time. They do produce nice bright white light but at the cost of some heat and high-power consumption. When those die, they will be replaced with LEDs. For seldom used exterior lights, nothing beats the old incandescent bulbs in a good fixture. They are instant on in cold weather and the fixtures are simple. I suspect LEDs will eventually win that segment too. For reading light, I still prefer good old incandescent lamps.
For vehicles – I’m squarely in the “Less is More” camp. And by “less” I really mean “fewer”. Under Virginia law any auxiliary lighting equipment added to a vehicle has to comply with the law and it must function. If it fails to function, it becomes defective equipment. So, the easiest way to avoid creating defective equipment is to not add equipment. My vehicles are old enough they still use incandescent bulbs for most of the lighting (brake lights, marker lights, turn signals, etc.) I’m sure LEDs will be the future for vehicle lighting.
With the possible exception of fog lights, I see no need to add complexity to vehicles that already look like a Christmas tree at the end of a runway.
Anyone remember the U.S. version of the late 1970’s Mercedes cars? They had 7” clear sealed beams outboard for high & low beam. And they had 5 ¾” sealed beams inboard that could be clear (driving lights) or amber (fog lights). They looked a bit odd because the lights were different sizes, but they were extremely reliable. Sometimes the simple solutions are the best.