I don't believe in bootstrappable systems, at least as they are commonly defined.
-> This technology can be brought up from nothing via some series of steps that may or may not include precompiled artifacts.
+> "This technology can be brought up from nothing via some series of steps."
+> (that may or may not include precompiled artifacts)
That's the common (in my eyes) definition: bringing up a system from some prerequisites. You'll either have some binary blob (with or without source), or you're left to flip some bits yourself via front panel I/O.