I don't usually comment, but since I'm trying to do nostr-only content... Ecash can be helpful or a hindrance. Basically, if the norm becomes closed non-fungible systems, where you cannot get out (think gift cards, arcade tokens) that's a clear lose. Unfortunately running a system like that is great for the person running it. On the other hand, if the expectation is fungibility: that you can seamlessly lightning out 24x7, and mints which don't do this are widely eschewed, then the promise is great. I hope for the latter, but fear the former. If the pioneers set the social norms correctly, it might just work though.