Samsung is unlikely to make the Galaxy Z Fold4 lighter than its predecessor.
According to Ice Universe, the Fold4 will be 263g according to the most recent data. Although this is slightly less than that of the Fold3, which weighs 271g, the difference is not significant and is hardly noticeable in real life.
We also recall that Samsung had previously focused on size and weight parameters in order to make its new flexible flagship lighter and thinner. We are still not sure of the thickness, but the source says that Samsung failed to achieve the mass.
However, the Fold3 is not unreasonably heavy. We can recall that the iPhone 13 Pro Max weighs in at 240g.
Ice Universe was the first to be discussed