See, for example, the world's fastest super computer. That's a whole lot more than a presentation tick box.
As someone doing relatively small scale work, on gaming cards, you just aren't the target user. While these kinds of users are well represented on forums, they're a rounding error in terms of actual $.
Switching to SYCL makes no sense. They need to unseat Nvidia, and specifically CUDA. The whole point of HIP is to clone CUDA, make it easy for users to switch and piggy back on Nvidias success.
I used to work in this space (not at AMD lol), and generally I don't think the comments on HN are fair to AMD. Obviously ROCm has a long way to go (CUDA and libs are some truly amazing work), but it's going.