>>375036590
vrchat has U# which is someones translation of their shitty graph system to something that is basically C# again. You can even overwrite their player controller with some tricks if you wanted to show off yours. I have seen very few people actually make a demo in vrc for a different vr game or framwork. 
>>375037648
Once people start to stray away from making just VRC stuff they'd probably use your framework. But thats if they start to make their stuff away from VRC... you could always get it to work in vrc and sell it on booth as a prefab. might b cool