I've tried having it shorthanded earlier with `$sx` but it made source harder to read. An interesting pitfall is that you won't be able to use such alias in pattern matching:
```
scala> val sx = q"_root_.scala.xml"
sx: reflect.runtime.universe.Select = _root_.scala.xml

scala> val SX = q"_root_.scala.xml"
SX: reflect.runtime.universe.Select = _root_.scala.xml

scala> val q"$SX.Foo" = q"$sx.Foo"
scala.MatchError: _root_.scala.xml.Foo (of class scala.reflect.internal.Trees$Select)
  ... 43 elided
```
I guess this is caused by reference equality check vs value equality.