if a single-bit bit-packed variable was available in Arduino, you wouldn't use them?
You know, probably not. They cases where I need a bunch of individual bits in quantity enough to impact memory usage (or program readability) are essentially non-existent.
Arrays of bits, sure. Single bit values as a part of some higher-level structure - those too. But those are all things that are likely to be abstracted in better ways than having a single-bit basic data type and treating them like I would in a ForTran program...
(These conversations are difficult if you only drive by every couple months to participate...)