Comment by surajrmal

Do vendors give you schematics for boards they make or RTL for asics? Where do you draw the line as to what is expected? From a hardware vendors perspective, firmware they give you which is locked down is simply an extension of the hardware that enables them to more cheaply iterate on it. Not a feature for customers to use to arbitrarily modify and add complexity to the test matrix and technical support for the vendor. Vendors who give away full configurability tend to see their costs rise rather than fall.