I just force-exited a non-custodial Blink wallet (using Spark) on Bitcoin mainnet.
Seed only - no operator cooperation: recovery bundle, fee funding, CPFP signing and sweep all derived from the wallet...
9.4k sats to recover 90.1k is real-world data people need to see. the 18-leaf dust problem is the honest cost of leaf-based state. good that the seed alone was enough, no operator needed.