I assume you're talking about crediting beat makers, arrangers and producers rather than just the "traditional" way of crediting the people who come up with the melody and lyrics?
If so, I agree with an addendum: I think it's more about the "culture" around songwriting credits rather than the definition itself, as this was kind of always possible to do, and some people today still do the "old way". For example, back in the 60s/70s some bands like The Doors and Deep Purple would credit the whole band. And sometimes producers would also get credit, like Brian Eno with Talking Heads from the top of my head.
If so, I agree with an addendum: I think it's more about the "culture" around songwriting credits rather than the definition itself, as this was kind of always possible to do, and some people today still do the "old way". For example, back in the 60s/70s some bands like The Doors and Deep Purple would credit the whole band. And sometimes producers would also get credit, like Brian Eno with Talking Heads from the top of my head.