Yes, more resources in absolute terms. But was tungsten so easy to find and process?
Same as above. Also tungsten bulbs are one of the best known examples (together with nylon stockings) of planned obsolescence. There’s a famous case of one of the first filament bulbs ever produced (made with a carbon filament, before the introduction of the thinner tungsten filaments) dating back to the early twentieth century, still working in a U.S. fire station. Leds last longer than tungsten bulbs produced with planned obsolescence.
That’s great when you do not leave the room for too much time
You’re right, that’s true. But once you’ve mastered the new measurement of quantity of light (lumens) for your preferred kind of light, then it’s a lot easier.