They didn't promise a Linux client. Idk where you saw that, but whenever they said future clients were coming, I never saw Linux mentioned.
A couple months ago though (if that), they did say Linux support was coming in the form of a browser client, though that's already a thing, you can already use GFN on Linux w/ a chromium-based browser.
A couple months ago though (if that), they did say Linux support was coming in the form of a browser client, though that's already a thing, you can already use GFN on Linux w/ a chromium-based browser.