The Netherlands will be especially impacted by this. We refused actual legalization for many reasons, many of which will be invalidated by Germany decriminalizing. Our current stance on weed is so confusing that it's hard to explain to any foreigner, but strictly speaking weed isn't legal and not even decriminalized... But yes, Amsterdam is in The Netherlands.
For anyone else wanting to know more about the Dutch policy on this: https://www.government.nl/topics/drugs/toleration-policy-reg...