So does this mean that Composer would get stable dependencies for everything in the project except for laravel/framework dependencies?

👍

So does this mean that Composer would get stable dependencies for everything in the project except for laravel/framework dependencies?

No, this means composer will get stable for everything apart from laravel/framework itself. This means people will be running with stable symfony compoents etc.

Nice 👍

Doesn't adding @dev mean that laravel will use UNstable dependencies by default?

Forgive my misunderstanding here.

No. '@dev means get unstable laravel/framework only. The other meant get all dependencies dev.