I'm not sure IntelliJ is substantially different on each platform. It's basically the same app but bundled with a JVM. IntelliJ shows that Swing, even though it

I'm not sure IntelliJ is substantially different on each platform. It's basically the same app but bundled with a JVM. IntelliJ shows that Swing, even though it's old, is still a perfectly serviceable toolkit that can make competitively attractive apps in a cross platform way.