They dismiss the best option - choosing another symbol instead of a period with hardly a though because they don't lke "line noise". Just as `?` was introduced

They dismiss the best option - choosing another symbol instead of a period with hardly a though because they don't lke "line noise". Just as `?` was introduced, I don't see a good reason ("line noise" doesn't even count as a thought) that they wouldn't introduce postfix notion with `@` `#` `$` or any thing else similar. If they are looking forward to expanding postfix synax for things like `match`, then this would provide them with the most flexibility and essentially provide a new namespace for those features. "Line noise" isn't a reason. APL had it right in that consistent syntax (Perl doens't count as consistent) is useful.