Gdx-Liftoff has replaced gdx-setup as the new official setup tool! Available here. You have a choice of languages you can add. TeaVM is available to allow Kotlin web apps. You can choose from several templates, including some meant for Kotlin apps, and one template is a playable sample (Super Koalio). Many third-party extensions are readily available. Folders are structured differently, but are easier to add unit tests to, if you want. It’s lwjgl3, not desktop, now, because it uses LWJGL3. LWJGL2 is also available if you need it. Raeleus made a video about it. Hooray!

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