Okay so maybe I’ll rephrase - don’t panic in a nonconstructive way. Like I don’t think this should set off the “guess I better migrate my data” alert, as @andrewlu put it.
Panicking in a constructive way is good though! If the thought of Beeminder going away is panic-inducing to you, I’d suggest the following task to help make sure it doesn’t go anywhere: show Beeminder to someone who’s never seen it before and watch them try to figure it out. Tell us the major stumbling blocks and the things you’re kind of hard-pressed or embarrassed to explain to them, and tell us! Should probably start a separate forum thread for it.