Your competitor, “IntelliJ Air”, has a very useful feature: it allows multiple instances to be opened, each one focused on a different workspace or repository.
This makes it very convenient to organize work. For example, on one virtual desktop I can have a setup consisting of IntelliJ Air + IntelliJ working on repository A, such as the frontend of a system.
On another virtual desktop, I can have another instance of IntelliJ Air + IntelliJ working on the backend.
This is not possible with Codex. Instead, I either have to pin the app across all virtual desktops or keep moving it between them, which is much less practical.
Consider it please 
Thanks!