What about the people already here?

The last government figures showed that 2.7m out of the 3.6m EU nationals have applied for settled status, of which 2.5m applications have been concluded.

That still leaves another 900k people who have not yet applied (deadline is June'21), it will be interesting so see what happens, as the deadline is 6 months after the negotiation period ends.

Personally I may have the opposite problem. I'm moving to Poland from August, until 2022 or 2023, I guess I might need to qualify to work in Europe! Sadly moving those 750 jobs from UK to our new "in EU" facility.