dragging forward (for years now) unclear on the need for it but having been burned too many times by its undocumented ways. Returned to the fray once again and encountered shocking success levels with the abatement stick. Dumped all kinds of unnecessary code (or so we can hope) and seem close to fixing some fundamental issues. But we've heard that before. No review.
some changes I made with slice to reduce the number of implementations and surface area for inconsistencies and bugs. Altering those changes in a more performance-mindful way, although I don't see anything here which is likely to help much. Also fixing some wrong documentation about copyToArray. No review.