Originally Posted by Lore

I have relocated from the US to the EU. The two airlines I fly the most with now are SAS and Lufthansa.........Since I now live in Europe, should I switch to Lufthansa's Miles & More or the SAS Eurobonus programs, or should I stay with United? I don't come to the US as much as I used to, so the benefits from United are actually not relevant to me anymore.