They certainly have a large installed base...
reliability,
A "good" tungsten lamp lasts thousands of hours, any old LED lasts a hundred times longer. LEDs don't quit when you drop them, and they don't scatter broken glass.
simplicity,
The principles of operation are easy enough to understand.
economy,
As in low cost to buy? On a per unit basis, true, but it takes scores of tungsten light bulbs to provide light for as many years as a single LED lamp.
efficiency,
Only a small fraction of the energy that goes into a light bulb comes out as light, most of it comes out as heat.
and most important...what I like best.
No argument there!
You missed one, Tungsten lamps simply put out more light than an LED lamp. That's a big sales point.
There is nothing more simple to troubleshoot than a filament lightbulb. No moving parts. No circuit board. No capacitors or semi conductors or anything. Just a filament in a vacuum. AMAZING!
I'm not quite sure what good it does you know the filament is burned out. It's not like you can repair a light bulb!
No. No repairing. You just throw away.
I think you don’t get it. When the light goes out(I’m talking about a vehicle not your dam house you nitwit) the first thing you do is check to see if the bulb is burned out. If it is, you throw it away and put a new one in.
If you have those damned LED nightmares, you don’t know what the problem is. It could be a faulty circuit board. It could be faulty wiring. It could be anything. You have to get a meter and start testing for voltage here and there. THen, if it is the LED/circuit board thingy, you have to pray there is someone somewhere with one in stock exactly like yours. There’s no standard LED setup. Every light is unique.
LEDs suck. Filament bulbs are the only way to go.