TR4A, there appears to be some confusion from your unusual definition of EFIS. I understand that most “glass / flat panel” flight decks are “Electronic Flight Instrument display Systems”, the display formats can vary from strip speed/linear side scales to analogue dial formats.
The SW installation uses the alternative analogue format, which for some opinions are better instruments. E.g the airspeed indicator has a longer scale length and gives improved speed awareness due to the angular pointer, and together these features improve the rate of change cues; there are similar arguments for the altimeter.
The commonality with other fleet aircraft and training issues are positive safety benefits that other operators should note.
Now, if only SW could take note of the airspeed scale more appropriately on final approach, and not expect a reading when taxing!! :-)