I had quite a few hours on a Wabco 111A paddle scraper. This was back in the late '70's/early '80's. Electric steer and electric chain drive, hydraulic bowl lift and eject. Biggest problem was the electric steering contactors dropping out from low voltage as you slowed for a turn. It didn't take long to figure out you slowed before a turn, and turned at full rack.
IIRC, the electric system was 240V 3 phase. However, it was a 120 Hz system, which allowed more power for a given size motor. The contactors had silver alloy contact buttons, and were expensive enough I just redressed them, never replaced any.
I was a youngster then and it was always interesting talking to old hands, as any mention of LeTourneau or electrics always brought out stories, ranging from scary to roll on the floor funny.
With the capabilities of modern day variable frequency drives and large scale experience from Tesla and other electric vehicle manufacturers I expect more tries at electric. Like any new venture, you can always tell the pioneers, they are the ones full of arrows.