The pin muxing on some of the lines is kind of a drag. Is there any architectural reason ADI couldn't bond out a special 500-pin (or whatever it would take) BGA of the 518F (for instance) and have all peripherals available?
Is there an architectural reason this couldn't happen (e.g. 12 DMA channels wouldn't be enough maybe)? Or is it a marketing thing (e.g. I am the only one who would want this, and I can't pay $100 for it)?