Power ISA is long-term stable. A catastrophic mistake has been made in
ARM SVE/2 and RISC-V RVV: "Silicon-Partner" Scalability, marketed as
a feature, allows the same instructions to mean different things on
-different implementations (a different Vector bitwidth).
+different implementations (a different Vector bitwidth).
Binary interoperability is thus not only impossible to achieve but
Illegal Instruction trap-and-emulate is also out of the question.
Worse than that a **future** vendor may suddenly render
-**all existing** hardware non-interoperable. It is the worst possible
-thing for any specification to permit new vendors to damage earlier
-implementations, yet this is what is permitted in SVE and RVV
-*by design*.
+**all existing** hardware non-interoperable, which is the worst possible
+thing for any specification to permit
+yet this is what SVE and RVV do *by design*.
**Simple-V guarantees binary interoperability** by defining fixed
register file bitwidths and size for all instructions. This does