Walrus does not insist storage be permanent.
It insists storage be durable enough to fade into the background.
Fragments shift. Nodes rotate. Months pass. Nothing interesting is supposed to happen in that stretch. When it does not... apps stop contorting themselves just to survive the next cycle.
That stance filters expectations early.
You are not building around heroics or recovery drills.
You're building around the assumption that data will still be there.
That is actually not a guarantee.
It is a constraint the system refuses to relax.