Well, if the large majority of your population is already vaccinated, I guess these passports could potentially be dismissed, if masks are still mandatory, but for some countries - like Portugal where we have +80% of the pop. vaccinated - the main concern are tourists that completely disregard any etiquette or measures in place.
So I think keeping passports is a good measure, not perfect due to breakthrough infections, still better than nothing.
So I think keeping passports is a good measure, not perfect due to breakthrough infections, still better than nothing.