I just started another libGDX project a few months ago (2D only), in Kotlin; it still works as well as it ever did. Have had no issues running on Win/Mac/Linux. Could not find any reason not to use openGL.
I have a feeling GLSL shaders will never die and I'll be writing them when I'm 80.
I have a feeling GLSL shaders will never die and I'll be writing them when I'm 80.