What are the Pioneer Square and "3rd and pike" of Frankfurt or Amsterdam?

Anecdotally, I observed daytime public intravenous drug use within my first 3 hours on the ground in Frankfurt a few years ago. I don't know exactly where, but it was within walking radius of the main train station. I think it was in/adjacent to some kind of red-light district.

You understand that the whole point of this article is that Seattle is turning away from the traditional view of drug use - a moral failing that needs to be punished - and toward a more modern view - a medical condition that needs treatment - right?

Punishment of drug use does nothing to prevent drug use. Its only value, therefore, is sadism.

I wasn't replying to the article, I was responding to your claim that this change (as already exists in non-US cities) would lead to better results.

I support decriminalization on purely moral grounds, but am skeptical this will lead to less (and not more) drug-related crime or public use of hard drugs, based on my anecdotal observations in Europe.