7D & Lens Pictures [CR3]

Yes. The CoC concept assumes that you use certain variables defined (e.g. magnification of the “negative” and viewing distance). These assumptions are washed away when viewing 100% on the monitor.
ms’ post show just how most uneducated people thinks. If you have disturbing diffraction at let say f8, there is nothing the resolution of the sensor can do anything about, diffraction can’t be avoided.
Ofc a low resolution sensor may not detect it but in the end (the final image) the higher resolution sensor will not show it either (keeping the CoC constant)