A job is a relationship. The fictions you get force-fed as part of growing up in Western civilization (not sure about other civilizations) about romantic relationships mislead in the same way.
Most notably, a relationship is different from years [2,4) than it is from year [0,2) and there's no way to make that not true. Maybe you really like the [0, 2) thing -- the excitement, the sense of possibility, the novelty -- and there's nothing wrong with that, but it's an important thing to know about yourself.
Of course, as with romantic relationships, you might find that as you get older it's harder to keep jumping from one [0, 2) gig to another, without facing consequences you might not like: reduced choice in jobs; reduced pay; getting a reputation as someone a company shouldn't invest in, etc.
Most notably, a relationship is different from years [2,4) than it is from year [0,2) and there's no way to make that not true. Maybe you really like the [0, 2) thing -- the excitement, the sense of possibility, the novelty -- and there's nothing wrong with that, but it's an important thing to know about yourself.
Of course, as with romantic relationships, you might find that as you get older it's harder to keep jumping from one [0, 2) gig to another, without facing consequences you might not like: reduced choice in jobs; reduced pay; getting a reputation as someone a company shouldn't invest in, etc.