It will always be a compromise. The amount of light, whatever you do, it limted. And that means that if you increase the size of the sensor, you have smller pixel size on the sensor, lower dynamic range, sensitivity, on teh other hand you also have higher amount of data to transfer to the card and so on, so eventyally you are limted buy a "limit". Technology allows to streach the upper limit, but it will always be there, and unfortunately you can't "have it all" (see the differnces between the 5D and the 5Ds as an example). The first 1D was.. 4MP? up to ISO 1600? technology now allowas it to be 20MP ISP up to 819200... the upper limit is streeached up, but eventually it is there, the sky is not the limit.
In metaphore, you can't have a family off-road furmula 1 car.
By the way, it goes back to the question "what is a PRO".. A PRO can be action, nature, social, artist, atchitecture, each needs diffferent camera, compromise on what the need more, what they can sacrifice in order to get what they want.