Re: slideouts
I like electric best. VERY reliable. I have replaced ONE motor in 11 years.
With Hydraulics, the lightest slide goes out first, then the next heavier one until all are out. Maybe you don't want open all of them...some have valves at the pump to turn off a particular slide...Pain in the rear....
With Elec, you can pick and choose which one you want to go out just by hitting the switch.
Most these days don't have cables and I have seen only a couple jump gears. BUT I have run new hydraulic lines from one end of the trailer to the other and primed with oil....another pain in the rear.