I imagine incandescent will remain if for no other reason than lava lamps. They’ve got just enough fans and the incandescent is perfect for them. If their manufacture goes away some niche uses company will probably pick them up.

Period focused lighting may also use them. And, now I’m remembering the monthly or so task of having to replace light bulbs back when I was a kid. It feels like a ridiculous old timey thing these days, like milkmen.