If you were to use Janet arrays as one uses lists in a lisp, then you’d quickly find yourself in a performance tar pit. Arrays would be frequently allocated, freed, resized, copied, and so forth.

A linked list built around cons cells allows slicing, augmentation, filtering, and so on almost for free.

That means writing in a proper lisp lends itself towards almost thoughtlessly mutating and manipulating lists; whereas writing code in Janet means spending more care about what you’re doing with the data structure.