I call it the BBD syndrome for Bigger Better Deal Syndrome. People won't commit to things anymore. I literally have had people, as have my friends, plan to meet them, confirm it, then continue to look around for a BBD behind their back.
Everyone is so worried about missing the next "off the hook" (HATE that term btw) thing that no one is willing to just say "hey, that sounds like fun, lets do that!" and leave it at that.
if i sign up for one thing, i am signed up. if something else comes along that sounds cool, i say "oh well, sounds fun but will have to be next time".
This is also why I rarely publicly say where i will be for swing stuff unless I know with 80% or better certainty that I'll be there/I'm not considering anything else.
And I sure as heck wouldn't say I'd see a couple and then cancel on them to do something else.
Sorry, just a pet peeve of mine.