BMC's frames with DTi — Dual Transmission Integration — are future-proof. They provide clean cable routing for mechanical groupsets, but also allow for electronic components if you decide to upgrade.
Electronic shifting requires a sizable battery and BMC hides it well, underneath either the chainstay or downtube. Wires then travel up through the frame, exiting close to the front and rear derailleurs.
All the holes are in the right place on the frame. With no unnecessary cable stops and minimal electronic wire exposure, BMC bikes keep a sleek, clean look, regardless of which type of drivetrain you choose.