Lynn, Google “Jobst Brandt and backlash” for issues regarding Octalink cranks. That said, I very much liked them too.
Again, one of the main reasons for “innovation” is ease of assembly. Every outboard bearing I’ve dealt with you can practically thread in by hand. More over the torque specs are very low (unlike Octalink and square taper). Much like integrated headsets, outboard design save time during assembly.