That’s ~15% improvement

That’s not nothing

Parent is wrong, the Air is 165g, not 146g. The previously lightest iPhone in production is the 16e at 167g, so almost no difference in weight between those two.

The iPhone 12 Mini weighed 135g. Even more improvement :)

The correct solution already existed but it wasn't expensive luxury fashion bullshit enough so it didn't sell and they'll pretend it never existed.