Adding to RodgerTheGreat's comment: for me, k's power is its rich set of adverbs that are convenient to write.
Notice that aside from reverse (monadic |), all verb symbols in the above code are in most other languages (max as |, min as &, plus as +, minus as -). Adverbs (such as / for reduce and \ for scan-reduce) make the symbols we already have more generally applicable.
I think a language could go a long way with a small set of basic arithmetic symbols alongside a rich set of adverb symbols.
I think we need some kind of grouping function, but it doesn't have to be the 'generate group indices' function. I'm sure we'll have alternatives available such as `update ... by`.
In the Wordle dict example, it would have helped if a type system could tell me I was wrong when I assumed that an indexing miss would generate an empty list.
Yep - added a link to some simple examples in the article (below). Throughout the article there are also a few links to executable versions of the code examples.