Mike, part agree, part disagree. Career airline it isn't however a recognised grounding for a future career path it is. I'm not sure if 'most' FOs believe that the grass is always greener. Whilst there isn't an ambition to remain here forever more, I think a few FOs have become wise to the fact that it is better to leave after a year in the LHS than leave from the right. Command time is and will remain a valued commodity. Whist a 2500 hour FO meets the minimum entry requirements for Emirates; he/she is as just about as useful as tits on a nun everywhere else!