Well, Generation Y/Z think they are entitled to an “ upgrade “ as soon as they meet the minimum hours. In my day you had to have the hours but more importantly be suitable .
if you join BA/ virgin on LH, you should be clear it’s the long game.
One of my colleagues is off to KLM. He reckons several years as a second officer now, before incredibly slow progression , but he’ll earn more than me in his career I’m sure .