If the arrow operator is used on an array, then the debugger currently shows a blank cell, while in C it would access the first element.

I often use a single-element array for stack variables that are repeatedly passed by pointer. Example:

void inner(string_builder *sb, ...);

void outer()
{
    string_builder sb[1] = {0};
    inner(sb, ...);
    inner(sb, ...);
    inner(sb, ...);
    inner(sb, ...);
    inner(sb, ...);
}

Within inner, both sb->some_field and sb[0].some_field work, but within outer, only sb[0].some_field produces a result. It would be convenient if some_field could be accessed in both inner and outer using the arrow operator, like in C.