It feels to me that a period as short as that would prevent you from learning a whole bunch of interesting things.

Technical lessons about design, architecture, and infrastructure choices one has made, how they cope with scale, subtle mis-steps, etc. Interpersonal lessons about how people develop and communicate. Lessons about why some approaches work and don't work organisationally.

The places I've seen this at were either agencies (so short/medium term projects) or startups where employees churn so much that a year later almost everyone is new again.

Like I said, might not be representative but has been my observations.