I get a lot of use from the travel adjust on most of my forks.
Wee hardtail jumps better with 100mm, 120mm is better for trails.
Heckler climbs steep stuff better on 115mm than 160mm, even when trying my best to use proper technique.
A more xc hardtail has adjustable forks but gets left in 130mm all the time.
I’ve had a few non adjustable travel forks and really missed the choice.