Vulkan & Metal both have equivalents, at least for Linux & MacOS. As do most modern consoles.
Mobile is an issue, yes. Though curiously sphere impostors were first proposed for use with and implemented using GLES 2.0 for a significant performance and quality improvement in drawing thousands of spheres for molecular rendering. It all depends on what your use case is.
Also hardware with Shader Model 5.0 support came out >10 years ago now. There aren't a lot of desktop computers still using hardware that don't support it.
Mobile is an issue, yes. Though curiously sphere impostors were first proposed for use with and implemented using GLES 2.0 for a significant performance and quality improvement in drawing thousands of spheres for molecular rendering. It all depends on what your use case is.
Also hardware with Shader Model 5.0 support came out >10 years ago now. There aren't a lot of desktop computers still using hardware that don't support it.