[lowkey_]

TL;DR:

They're using the wrong denominator, comparing apples-to-oranges. They aren't actually revealing that an exodus didn't occur, they aren't debating any numbers or adding any new data.

I added context for people who aren't familiar with the UK non-dom status, or the original intention of the legislation.

They're also a very biased organization, same as the organization behind the original report apparently.