* Unicode operators
* Sigil Invariance (@list and @list[5], not @list and $list[5])
** Mention adv. of variance in P5 that still hold now in P6 (masak)
* Operator clarification (e.g. +^ ~^ and ?^)
* Started as a well-defined specification, not as an implementation
* No one, official implementation (anything that can pass the testsuite is P6)