Effect of containerisation and/or Ro-Ro during WW2

What would have been the effect on logistics of the introduction during WW2 of containerisation and/or Ro- Ro (using quays as they do today rather than limited to LST’s that beach themselves and train ferries)?

Presumably some of the advantages of speed of discharge are lost while the ship waits for the next convoy but you do clear the port facilities quicker for the next ship.

Would is be possible to control the whereabouts of containers with the systems available at this time?

Would we see some 1940’s equivalents of the container cranes we see today or would the loading and unloading rely totally on conventional cranes?