You're kind of leaving out the whole "literally poisons the user or gives them cancer" part. I certainly wouldn't trade slightly better thermostats for a higher risk of heavy metals poisoning.

Also LED bulbs are great – they're much more efficient, and much cheaper. They can be great for reading, you just need to get one of the correct brightness. You can even do things like https://meaningness.com/sad-light-lumens which would bankrupt you (figuratively) if you used tungsten filament bulbs. Obviously you want to get LEDs of the right hue, and LEDs tend to be a bit colder than tungsten by default. Of course the upper range of tungesten is higher but this is irrelevant for all practical purposes (unless you're staging a West End or Broadway production).