Sure. They are meant to have proper semantics where div and span still don't (and shouldn't). Roles are also natively associated with them.
It means now
- be conservative with sections and articles. Use them as large wrappers rather than wrapping every possible little sub-something in them-- consider using divs for that.
- don't choose outline-sectioning elements based on an expectation of making a document outline, since it's at-risk.
If you have a large chunk of content that really is an article, or a large page section, go ahead and use them if you want.