I thought this change of SAS from Star Alliance to SkyTeam was interesting.
https://thepointsguy.com/news/sas-scandinavian-airlines-air-france-klm-star-alliance-skyteam/
Makes me think that SAS will soon enter the Minneapolis/MSP market, and Delta will have more nonstops to Stockholm and Copenhagen from US hubs away from the East Coast. Frankly Delta's hub population demographics have always been a better fit with SAS than Star Alliance hubs, I wonder what took so long. Those of us who play the points games will soon be able to book SAS flights with Virgin Atlantic points, which are easy to obtain from credit card points transfers.