As for string concatenation operators, I would like to draw your attention to a couple of points discussed last month in p6-language:

• Andey Wardley asks why can't we use +
• Larry Wall explains why we can't use space (i.e. juxtaposition).

Reference: pdcawley's most excellent summary.

I would say we are in need of a concatenation operator. I don't always want to interpolate within a string to join things together. And using join to join two scalars together seems cumbersome.