I did briefly look at electric pumps but a lot seem for race use, so not sure about using them long term on the road. I have seen some people claim 10-20K miles on one alone with no issues. It would be expensive though and it would take a long time to recoup the cost on EO(ff)C vs EO(n)C.
I'm sure someone on here will have done 100K in a TDi with EO(ff)C with no effects, we just need them to step forward and we'll all believe them...
EDIT - The ones I saw were also more for bikes that cars.