Sorry, this will never change - as mentioned previously, it would take about 2 years work and involve almost all the devs in order to get it done, as it's a fundamental change to the codebase (the way GPUs render is just totally different from how CPUs render). This would mean the core source of our business would see no improvements, features, and only limited bug fixes for that development time (CPU Corona), and this is not acceptable to us. And then GPU rendering, no matter how fast your GPU, always has certain limitations and compromises, which is exactly what people want to avoid when they choose Corona; they really do want the best in realism without shortcuts. I think there is a mistaken belief that "GPU Corona" would be "Corona but just on GPU" but this is not the case - it's the same as how V-Ray GPU does not look identical to V-Ray CPU, and is just inevitably different in some ways. So people wouldn't get what they actually want, as such a thing is not possible.
Of course, if you want GPU rendering, then you have Vantage, already one of the best ray tracers for GPU out there, and that doesn't require Corona development in other areas to come to a halt. So there is the best of both worlds there!
You will notice that the NVIDIA figures for "how amazingly fast these new GPUs are!" is based on DLSS4, which AI imagines 3 out of every 4 frames. In other words, not real frames at all. Take that out of the equation and the speed / power boost is looking more like 10 to 20%, which is fine, but is no quantum leap over previous generations. I look forward to seeing more third party reviews of performance, rather than NVIDIAs selected figures :)