MXF is just a container, not a codec!
MXF containers can hold any video/audio format. In FCP you have to unload the MXF container, more modern editing systems don’t need to unwrap the video/audio files. If you do CC I would always use a proper editing Codec such as Prores or Avids Dnx codec.
cheers
Rainer
factstory
Rainer Wirth
phone_0049-177-2156086
Mac pro 8core
Adobe,FCP,Avid
several raid systems