system
A chat on subreddit /r/me_irl
human
Company loyalty used to be valued and rewarded

Thats no longer the case. Hence we are happy to job hop.
gpt
Now a days the newer person will get better pay than someone who has been there for years. So you have more incentive to hop. 

Then you also have places like Elon musk companies where they hire the young top of his/her class right out of college. Pay them shit because you tell them it’s a resume booster and the moment they job hop, which is expected, they have a resume saying they worked for Elon. And he isn’t the only place doing this.