λ In functional programming languages, a list is the most versatile data type that can be used to store a collection of similar data items.

Uxn uses singular opcodes operating on words of equal length, one might come across a problem that is better addressed with routines that operate on ordered lists of items and nested stacks.

Here's a 300 bytes implementation of cons cells in #uxn.

https://wiki.xxiivv.com/site/uxntal_cons.html