Out of curiosity, are you the kind of person who complains if Google shuts down a free product with less than a 1 year heads up?

I wonder how some HN commenters would do at being head of state, sometimes. The bar seems to have lowered lately anyway.

Edit: just to clarify and be less dismissive: Banning things everyone uses with little homework is a great way to fail at it. Since this is a tech forum, you can think of it kinda like upgrading your language, framework, kernel and landing a massive refactor, all at once, in production, without testing. It's like that, except you have tens-to-hundreds of millions of users, and their lives are at stake.

Bans take time, otherwise they're not effective. Besides, if they had announced 2020, I'm nearly certain the parent comment would ask for 2019.

Bans like this are unlawful and should be countered by a revolution.

Don't forget that car companies plan years ahead. Setting an end-date like this brings the subject on the table of the car companies' board rooms.

And setting an impossible to implement date of 2020 is a great way to ensure they donate their money to whoever's running against you.

Then, you have a much bigger problem to solve (your campaign finance system). This looks like corruption to me but I'm no US citizen.

How do you solve your campaign finance system issues if you're not in power because, when you are, all you do is piss people off by banning their cars with little to no heads up?

"Why don't government simply act without any regard for reality?" is just a weird question to ask.

Virtually nobody buys new cars in Denmark because of the taxes anyway, and even if they did, it's a very small country (~5M) and would only account for a very small percentage of global sales. I doubt the subject of Denmark come up in automobile companies' board rooms at all outside of a small footnote on the occasional pie chart.