I'm not claiming that this shows SCION can replace the respective parts of the network stack right now, and you're right that at a global scale this is still an unproven technology. But I would argue that a technology needs a certain level of matureness / is not "snake oil" if it is deployed in a heavily regulated and comparatively conservative sector such as banking.

Why does a routing protocol matter for the banking sector? With proper encryption the route the packets of transaction data takes should not matter at all.

Aren't heavily regulated sectors the one where you usually encounter snake oil? Useless WAFs and other security snake oil products, Microsoft 'collaboration' jank like Teams and Sharepoint, MitM proxies, etc?