I use https://dro.pm a lot to share files or links. Since the links are super short (I just made https://dro.pm/a --- note that it'll expire in 12 hours), you can just give the link to someone over the phone, put them in a presentation, or just share files independent of any operating system.
I even use it even between my laptop and my phone fairly frequently, since the top suggestion on my phone keyboard in the browser is dro.pm and I just have to add a slash (long-press "m") and a letter. It's quicker to use dropm than to open a chat with myself or send myself an email or something.
Of course this is just protected by https, and although it is source-available and the links are really gone after expiry (or when you edited it, the old contents are irretrievable), magic-wormhole is superior in that you don't have a trusted third party. For the cases where the other party doesn't have magic-wormhole installed, this might be helpful. This also alleviates the requirement of WebRTC for both parties to be online simultaneously.
If I understand it correctly, the rendezvous server is not a trusted third party, just a message relay. They wouldn't be able to read or modify your file transfer's contents.
I even use it even between my laptop and my phone fairly frequently, since the top suggestion on my phone keyboard in the browser is dro.pm and I just have to add a slash (long-press "m") and a letter. It's quicker to use dropm than to open a chat with myself or send myself an email or something.
Of course this is just protected by https, and although it is source-available and the links are really gone after expiry (or when you edited it, the old contents are irretrievable), magic-wormhole is superior in that you don't have a trusted third party. For the cases where the other party doesn't have magic-wormhole installed, this might be helpful. This also alleviates the requirement of WebRTC for both parties to be online simultaneously.