yes, I also value portability, and this slim TongFang laptop has less than 2cm thickness and has a weight of only 1.7kg while providing about 80-90% performance of the top-of-the-line gaming laptops that have almost double the weight and size.
we are (still) on DirectX11, so no problems there, only less performance.
yes, the allowed power for the GPU is a main factor. a RTX3070 should get 125W with 15W boost to reach max performace.