All the media fuss was about dropping the tax-exemption completely. As I remember, you had to read the news about it very carefully to see that they did a gradual phase-out of 20%/yr or so.

It actually turned out that the change caused the EV sales all but stop completely (quite to the surprise of the tax authorities). So they're looking at re-exempting a few thousand cars every month.

Fun fact: The danish nickname for the tax authorities is "Skattefar", "Taxdaddy" - and it's the name of their twitter account: https://twitter.com/Skattefar

Probably people knew about it and bought their cars before the 20% tax increase