> Indexing backwards from the "end". Your language can always add an `end` keyword like Matlab does, and this stops Having used Matlab a bunch, in practice thi

> Indexing backwards from the "end". Your language can always add an `end` keyword like Matlab does, and this stops Having used Matlab a bunch, in practice this sucks, because “end” is treated as this weird special case in the language grammar, and many reasonable and convenient expectations of syntax that should work turn out not to. Folks writing complicated Matlab projects end up needing to work around it, and the workarounds are brittle and confusing. Using negative integers is a whole lot easier to reason about and work with. Everyone learns in grade school how to do arithmetic with negative integers (adopted by European mathematicians in the 17th century). Even Matlab experts don’t always understand Matlab ‘end’ arithmetic.