It's been a long road, but it seems GIMP 3.0 is nearing completion, with the release of a release candidate build.
Non-destructive layer effects, GTK 3 UI (with CSD option), new colour management system, improved onboarding, and a whole lot more.
https://www.omgubuntu.co.uk/2024/11/gimp-3-0-release-candidate-is-ready-for-testing
@omgubuntu now all they need is a less ridiculous name 😞