Universities, the Debian Foundation, Nvidia, the ccc, hell even Microsoft run magic-wormhole relays... the only thing new here is the subscription and the hipster gui client.
This is classic critique. Dropbox was criticized in the same way when it was announced years ago.
Magic Wormhole is cool (I just learned about it! Thanks! :)), but most people don't use nor care about the command line, and are probably afraid of it.
I think that might be billed on the sender vs the receiver. So if you're a solo creative person sharing stuff with clients, this can be one way of doing that. Also potentially useful for small businesses without an enterprise file sharing solution.
Magic Wormhole is cool (I just learned about it! Thanks! :)), but most people don't use nor care about the command line, and are probably afraid of it.