There is the IBIS mechanism. The protective shutter is much less expensive than the real shutter. I would think the mirrorless is less expensive to make and future advance in technology tends to favor it rather than the DSLR. I don't think they can figure out how to make less expensive pentaprism, shutter, mirror mechanism in the future. They would be able to improve the EVF greatly in the future like faster update rate and higher resolution.