As far as I know it’s not discontinued, it still is their flagship power amp. But they also came out with the Gan 1 and the Carina Gan. The Carina is a Gan integrated amp with Dac I believe, and the Gan 1 is kind of like a straight wire with gain that only has a digital input, I believe that all you could plug into it is a streamer Dac. The Gan 400 is just a straight up power amp, they are all different.