The company really do not care about who leaves or stays or comes so long as their schedule flies and their expansion plans go ahead.
That is not really any different to any other carrier. However, EK used to be a career airline, like the legacy carriers in the US and Europe. There are still guys who have been in the pit from close to the start up in '85. Their numbers are obviously dwindling but the guys who were in the 2nd pick up are now leaving earlier. Not due to having bulging pension pots but because the schedules are not pleasant or sustainable in the long term.
Basically a 5 year or so life span on the current roster pattern looks to be about it before exhaustion and loss of life quality takes its toll.
To put that into a 40 year flying career it doesn't sound much but think about leaving where you are and then looking for somewhere else in 5 years. You may not have a widebody command under your belt due to unforeseen issues, sickness, warning letter, etc.
How would 5 years or so flying big jets in the pit knock onto your current career path, marriage ? That is a question for the individual to answer but it's one you need to ask yourselves before committing.
Everyone has their own priorities its just that the company's , any company's, are NOT the same as yours.