A slight correction. The difference you note between list slices and array slices is in fact only there in some cases:
@a = ()[0,0,0];
@b = @c[0,0,0];
@c = (1)[0,0,0];
say 0 + @a;
say 0 + @b;
say 0 + @c;
__END__
0
3
3
The rule is that a list slice (in list context) produces an empty list if all the indices are out of range. This permits code like this:
if ( my ($dev,$ino) = (stat(FH))[0,1] ) {
where the error condition is "passed through" the slice and assignment to affect the if.
In all other cases, a list slice behaves just like an array slice.
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