There are several reasons.

1. Struct fields are really important in Rust because of auto-traits. Your life as a Rust programmer is easier if all fields fit on the screen, because one of them may be the reason your struct is `!Sync` or whatever.

2. Impl blocks can have different generic bounds from the struct itself, which is a nice shorthand for repeating the same generic bounds for a series of related methods. So you need to be able to write multiple per type anyway. It would he confusing if there was an “implied” impl block to look for as well.

3. It helps emphasize that Rust is a language that wants you to think about the shape of your data.

Dunno. Impl block are very similar to Go methods. I dont think one if better than the other.