ive seen a few more sprockets coming out in socket drive, its cool because the interface can facilitate inserts that can convert to spline drive meaning you dont need to switch to socket drive cranks straight away.
i guess the issue for most companies is making a compatible crankset. be hard to include the interface on a 3pc (unless you build it into the arm). maybe if more people knew about it and more companies were pushing it, it might catch on. if sprockets go below 25t again it could catch on, cos the regular sprocket bolt location interferes with the chain at such small sizes