It's also been the standard for that behaviour for shells and, well, lots of other things, for so long it won't change, and notice he also mentioned Ctrl-Space

It's also been the standard for that behaviour for shells and, well, lots of other things, for so long it won't change, and notice he also mentioned Ctrl-Space as an alternative. Though my hands don't complain so long as I don't use a mouse, so YMMV.