that thread doesn't go beyond current swift abilities, thus it is not in evolution.
and in evolution we sometimes try to go beyond current limits. for example:
modern IDE's are quite capable of converting things like "#imageLiteral(resourceName: "name")" to a symbol with an image. also syntax hilting is very useful (i fill completely handicapped when it doesn't work for some reason). what if we had an ability to create operators by putting identifiers in some tick marks, for example:
prefix operator 'not'
(if i remember correctly the straight apostrophe ' is not used anywhere else in the language)
then it would look like this in some ascii editor / terminal:
black 'and' write
which is not too bad. and it will look like this in Xcode:
black and white // with some prominent font selected for such operators
maybe not so useful for ! and && per se, but for custom operators can be very useful. for this i would trade swift's unicode support.