## Associativity of insert notation is awkard: `<[ k := v ]> m`

Because the notation parses only as `<[ k := v ]>`

as a function, you can't chain them together without parens.

`<[ k := v ]> <[ k' := v' ]> m`

doesn't parse, you need parentheses. How much of a problem would it be to extend the notation to `<[ k := v ]> m`

that is right associative? Are there a lot of users that use this as partial application?