Which is good, but interpolation is really just a specialized case of concatenating string literals and variables, not variables to other variables, which is where some ambiguity is introduced.
Yes, as an alternate syntax, interpolation works well to disambiguate your intent, which supports my point. It's really just a highly specialized form of a different operator, which says I work on strings, so anything I see that isn't a string coerce to a string. For example, in Perl
$varOne . $varTwo
Is entirely equivalent to
"$varOne$varTwo"
The question is why Scala chose to use + when it had other, non-ambiguous options, like above.
There are some thoughts about migrating people away from + toward string interpolation. But automated conversion tools are required before this can happen.
