Canon’s Chuck Westfall responds to my inquiry about the “silent shutter” or “mode 2” electronic first curtain shutter (EFC shutter).
Yes. All 3 new cameras have electronic first curtain in Live View when set to either Silent Mode 1 or 2.
The Nikon D810 also has an EFC shutter mode. Even with very well-damped DSLR mirrors and mirror lockup mode (MLU), a vibration free mode can be critical for things like super teles and macro work, or simply unstable ground (even on a tripod).