We should study it seriously, but it's worth noting even the article you linked to (which seems to be pretty biased, it should be noted) suggests the Portuguese model is far from a simple silver bullet:
> Despite encouraging results, conclusions indicate that these policies are marked by contradictions and ambiguities that have permeated its history since the very beginning, and modest ambitions, particularly regarding the implementation of harm reduction measures. Moreover, the polemical Supreme Court judgment that reestablished, in 2008, drug use as a crime when the quantities at play exceeded those required for an average individual’s use for 10 days, might have impacted the landscape of drug use penalization. The last decade saw an increase of punitiveness targeted at drug users, including criminal sentences of jail terms.
But it's hard to take the article entirely seriously when it acts as if the goal is, in their words, "emancipate drug use from the stigma that associates it either with crime or pathology," and it opposes acting as if drugs are a problem:
> Finally, casting drugs as malevolent agents that allow classifying users as bad or sick (or both) became a fabrication that eases the stigmatization of users and human rights violations.
> Despite encouraging results, conclusions indicate that these policies are marked by contradictions and ambiguities that have permeated its history since the very beginning, and modest ambitions, particularly regarding the implementation of harm reduction measures. Moreover, the polemical Supreme Court judgment that reestablished, in 2008, drug use as a crime when the quantities at play exceeded those required for an average individual’s use for 10 days, might have impacted the landscape of drug use penalization. The last decade saw an increase of punitiveness targeted at drug users, including criminal sentences of jail terms.
But it's hard to take the article entirely seriously when it acts as if the goal is, in their words, "emancipate drug use from the stigma that associates it either with crime or pathology," and it opposes acting as if drugs are a problem:
> Finally, casting drugs as malevolent agents that allow classifying users as bad or sick (or both) became a fabrication that eases the stigmatization of users and human rights violations.