I mostly agree, but in Bash for example "string1${var}string2" guarantees to be a single argument, which 'string1'$var'string2' doesn‘t (when $var contains whitespace). So it entails certain other language design choices.
in bash yes, so that makes sense. thanks for pointing that out. in elvish $var is guaranteed to remain one string, and so 'string1'$var'string2' is always going to remain one argument too.
