So, Lockheed put the fuses in because it was a good idea, Boeing put them in the 747 because of JAL123 (12 Aug 1985), and nobody thought this was a good idea for all a/c that would be uncontrollable without hydraulics.
Question: Did MDD/Boeing install fuses on the DC10/MD11 after Sioux City?
Has every type got to crash owing to hydraulic failure before that type gets hydraulic fuses?
This is surely generic to every wide-body that would crash without hydraulics, so why is the fuse safeguard not applied to all of them?