> It implemented support for objects at the hardware level,
  > with access protection for on a per-object basis.

Periodic reminder that Henry Levy's Capability-Based Computer Systems is available in PDF form for free¹.

The 432 was slow, but the i960² was a clean RISC that could have had a future.

¹ http://homes.cs.washington.edu/~levy/capabook/

² https://en.wikipedia.org/wiki/Intel_i960