Why did the touchbar not take off? It's pretty cool

[Lew Zealand]

I'm frequently changing volume and brightness so single, dedicated keys for each is a must, hence my dislike for the Touchbar. It does have good uses but the downsides are too many. I use an older Dell laptop from time to time and it uses Fn-Fkey for Volume and Brightness, and it's ergonomically equally awful but in a different way.