Nowadays the options for file transfers typically involve using some web services. One user would upload the file to some service, and it would be available for an http download by the other user (even if the link is protected).
As far as messengers go, most users use a mobile one now (understandably), and file transfers naturally aren't a part of standard featuresets (also understandably). What options do we have nowadays to send files to friends directly, on a computer, if we do not wish to go through uploading to a web service?
Similar tools: wormhole-william [3] and croc [4]
[1] https://github.com/magic-wormhole/magic-wormhole
[2] https://lwn.net/Articles/692061/
I believe both work offline.