Interesting topic
But I would like something to add.
Normally we will build V500/V1200/V4000 and lot of the things are done. I m satisfied how designing is going because we are doing lot of things in parallel. But it is only matter of time when project will go beyond being "just" an accelerator and become standalone system. In fact right now Vampire card with few soldered wires can behave as a standalone system. Right now no one can compete with our design and only right way to go is standalone system and that makes perfect sense. For standalone system we want to aim for much higher values than on accelerators. Start thinking about Apollo core and ASIC and start thinking about gigahertz 68k and lots of ram. For that part of the story we will need to find good and trusted partners and we made some good contacts so far.
