I would actually rather see manufacturers make specialty low-power versions of existing GPUs. For instance, how low would they have to cut the clocks to make it passively-cooled? Or, maybe actively-cooled but single-slot?
Another example: I have a friend who has a compact desktop machine and wanted to buy a dGPU for it, but it needs to be half-height, half-length, and fit in a single slot. Currently, the best card you can find that fits the bill is a Quadro T1000, which is basically a GTX 1650 with lower clocks. Why isn't anyone making a GTX 3050 like that?