It's a hit or miss, mostly a hit with Diamond status and the right approach. Unclear why SK and/or European Airlines still haven't been able to create a wait list setup like US carriers have had for decades as it opens up seats on later flights. An easy benefit that pleases customers at no incremental cost for the airlines but there seems to be an ideological sentiment against it. People who need flexibility or for those it adds value will continue to buy flexible tickets as long as the wait list isn't deterministic.