Is it worth using Competencies or Should we make the Plunge into Skills?

Summary:

I've noticed that the new AI data sources are all based on skills - well most of them anyway. And most of the functionalities of grow - including finding Career Ambassadors or related learning etc. is all based on Skills.
So as we're implementing this in-house, we wonder if we should use skills almost exclusively.

The trouble is that Skills are not available in the Performance Document yet to evaluate - that's like 25D or something on the roadmap I'm guessing. Oracle seems to want us to take a more dynamic and ongoing approach to skills management where everything is very fluid and updated whenever. That's great for like very dynamic organizations, but maybe not traditional organizations.