I went to EK as a DEC. I was a captain on a 737 at the time. The company I worked for was European based but due to the nature of the operation we flew through Europe, Africa, the ME, Asia and even got to Australia on occasion !! I found no trouble going from the 738 to the 777. But I must admit, I had flown over a lot of the EK network in my previous life.
These days a 240 k round trip is long haul enough for me 😄😄