I think Unison has the most interesting take here: https://www.unison-lang.org/docs/the-big-idea/

If you look at any language that has been around a while, with Java being a great example, you'll see many libraries that use an outdated coding style. Compare the different date/time libraries in Java, for example. Evolving these is always a problem, which I think Unison addresses in a way that lets the language evolve without having to carry too much baggage forward, while still not breaking others' code.