[Legogris]

> regular expression field separators using Rust's regex syntax

This actually makes choose a cut-killer for me. It can be frustrating having to figure out which delimiters to use - tabs or spaces? If spaces, you'll have to chain it with tr, or resort to awk.

[BiteCode_dev]

And choose makes it even better by using "\s" as a default separator. So you usually don't have to specify a separator at all.