Reactance. They didn’t feel like they had a choice.

Only because they weren’t a sizable market share.

CFLs were different and buzzy and the color was off.

Engineering problems that were solved within a few iterations. But by then LEDs that were better and cheaper were hitting the market and the argument became moot.

Now my biggest problem with modern light bulbs is the absurd market-ups relative to what they cost everywhere else on the planet.