A conversion program for the 777-300ER was just announced. Wonder if several of those may end up in our fleet within the next few years. Emirates is mentioned as having the most 777-300ERs in service and they do retire them relatively early. Something to watch considering our current 777F is former Emirates. Converted 777s would have a lower cargo density capability than the factory freighters, so they would most likely end up doing DHL-type flying.
https://www.flightglobal.com/news/ar...ersion-461491/