Difference now though - vaccines & testing. Both of which weren't available last year for holiday makers. It was 'here's a list of countries, quarantine or no quarantine'. Countries won't just be allowing anyone in. They'll have a list of countries allowed in & under what conditions, similar to us going out. There will also be emergency responses in place if infections do start to increase alarmingly. We have to start somewhere and put our faith in the vaccine & testing systems available.