Originally Posted by Demise

DOD already told him to eat a dick.

There's one problem with SIJ and that it's a subgroup of EB-4. EB-4 is no more than 7.1% of 140,000 employment based green cards, or 9940 per year further limited by the 7% per country limit, which limits it to 686 per country per year.

So assuming we'd have 1.5 million and Mexico accounting for about 80%, the backlog for Mexico would be up to 1,749 years and for the rest of the world (where no one country exceeds 7%) up to 32.5 years. Keep in mind that you're not eligible for jackshit if your priority date is not current, so you'd have the first few that apply and get adjusted, then years of backlog that have filed prior to retrogression and remain as AOS applicants , and then a whole lot more that basically won't live long enough.

I am not not even sure how priority date progression would even work for Mexico...

This is ignoring any other EB-4 category (also subject to the same 9940 per year cap) and any other SIJ applicant.

Only way around this would be to exempt SIJ from any numerical limitations.