There are brand new immigration protocols coming with the introduction of a points-based system. Plus the "Home Office will continue to refine the system in the light of experience and will consider adding further flexibility into the system..." [1]. I read that as points for various characteristics could vary quickly. Also the option to apply for the EU Settlement Scheme remains until mid-2021 if someone moved very recently.

Sure, that's just two avenues that jump to mind. There may be many more less orthodox routes that appear as the dust settles. We're witnessing a major shift in the status quo.

[1] https://www.gov.uk/government/publications/the-uks-points-ba...