I work in VFX and I see that OpenCL has been used quite a bit in DCCs such as SideFX Houdini (which uses it extensively) and Foundry Nuke which uses it a bit too. Most of the GPUs are NVIDIA but there's some AMD too, and it's ability to fall back to the Intel (CPU w/vector instructions) host when running of the renderfarm, is absolutely critical as farm nodes generally tend not to have GPUs (most of ours don't even have X installed! So no hardware-accelerated OpenGL OR OpenCL is possible at all!)

Also one of my favourite non-VFX projects: 'Gollygang Ready' uses it to accelerate reaction-diffusion simulations.

I (perhaps naively) thought that OpenCL would still be a thing in a post-vulcan world.. SideFX are working on a new viewport using it.. I guess they solve different problems so can still coexist?