744's were delivered with the #2&3 back up hydraulic systems with either air driven pumps or AC powered electric pumps. Twas an operator option. So, you never really know what your gonna have untill you climb in one.
We had a saying, our fleet was standard until we got the second airplane.
Obviously, we are talking about the used market.
The newest plane I have flown was the Tristar and at the time it was 10 or 12 years old. and that was 8 years ago!