I originally thought that this new regulation would only apply to, say, B-1/B-2 visitors applying to adjust their status (which is how some immigrants bring their parents, for example), but nowhere in the policy it explicitly excludes so called “dual intent” visas (H or L), so given the whole anti-immigration approach of the current administration, I won't be surprised if it turns out that the regular work visa pathway to green card is affected by that too.

Edit: the policy actually indeed mentions dual intent categories:

> USCIS reminds its officers that applying for adjustment of status is not inconsistent with simultaneously maintaining nonimmigrant status in a category with dual intent.

It does it in a way that will, for sure, cause confusion though.

[1]: https://www.uscis.gov/sites/default/files/document/memos/PM-...