This is already the case with Indians and possibly Chinese. The waiting time for h1b to green card for Indians is several decades right now and maybe 5-10 year

This is already the case with Indians and possibly Chinese. The waiting time for h1b to green card for Indians is several decades right now and maybe 5-10 years for Chinese. Things might get better if the climate discourages future immigration from these countries but there's already a big backlog in place.