Having grown up in the era of incandescent bulbs I remember the fancy white bulbs made with frosted glass being more expensive than the totally transparent ones you could see the glowing filament inside, because the filament was irritating to look at and the frosted ones smoothed out the light for you.

I'm very amused that we're now jumping through hoops to make skinny LEDs that can fake the look of the old filaments nobody wanted to look at back then, and those are now the fancy expensive ones.