Tab-completion is case-insensitive, so the names look good and are not a pain to type (and most importantly, they don't conflict with Unix names: Gobo predates

Tab-completion is case-insensitive, so the names look good and are not a pain to type (and most importantly, they don't conflict with Unix names: Gobo predates /sys, so going with non-Unixy names proved to be a wise choice).