AND...my first phone systems were SL1s and all their documentation referred to BIX cross connects--so I learned that, and stuck with what I know.
I do also appreciate that not every CG walks around with a BIX tool in their coat pocket, but they all seem to have a 110 tool at the ready. More than one CG (even on customer staff) has been intimidated by the BIX mounts--probably because they didn't hear anything about it in their University of Nowhere online courses. In either case, they call a PG or the original installer: yours truly.
Besides, when done right, the BIX cross connect is a damn nice looking piece of work.