Having been at B&D for a long time (96-2008) I can tell you the system tools (the Matrix was only the latest version, the first series was back in the late 80’s - with bakelite housings!) were just a marketing gimmick, but they sell well because most B&D products are bought as Holiday gifts (aside from kitchen and outdoor lawn tools) so they’re rarely used to much extent. As you’d expect, every tool in the system is compromised in one way or another to better suit the connectability of one of the other tools.