https://arc.net/ ? If I didn't already knew about it, looks like vaporware. No download, only a link that brings you to a form asking bunch of random personal questions, no screenshots (the ones that exists are censored? What).
It’s intentionally vague; it’s a marketing trick. The growth is happening through the five invites a week users get, spread through forums, Discord, etc.
Same, Arc has been pretty great so far, and they just launched their iOS "version" which has been neat too. It's become my default on my macOS machines.