[eschaton]

In addition, the semantic consistency of the frameworks combined with the verbosity encouraged by the language makes it easy to jump into a new-to-you part of a 25+ year old codebase and start making useful changes very quickly.

This is much more difficult when you have to be careful about what every single operator dispatches to, or when more than just the receiver’s type determines the method that’s called. You can look at code in isolation and get a pretty good idea of its intent and the routes that its implementation will take, both of which are necessary to start making changes.