Interesting to see the Linux version released. On Windows, though, my experience with the new ChatGPT app since Codex was folded into it hasn't been great.
I'm a Codex user, and when it was still a standalone app it worked really well for me. Since it became part of the new ChatGPT app, the app feels noticeably slower and, at least on my machine, is currently using around 1.27 GB of RAM [1].
The old ChatGPT app, which has now been renamed "ChatGPT Classic", feels much faster and is using around 478 MB under the same conditions.
I have a reasonably powerful PC, so the difference is pretty noticeable. I assume Classic will eventually be discontinued, but so far the transition to the new app on Windows hasn't been particularly good for me.