Recent discussions suggest that Jupiter, the largest planet in our solar system, once was significantly larger than its current size, potentially having a radius twice that of today. This significant size would imply a much greater mass, raising questions about how such a massive planet might have changed over time. The constraints on this concept include understanding the effects of its historical magnetic field, which was also much stronger than today's. The implications of these findings could lead to new insights into planetary formation and dynamics, as well as the evolution of magnetic fields in protoplanetary systems. Additionally, the debate around the specifics of Jupiter's mass loss or transformation opens up pathways for deeper investigation into planetary science and astronomy.