Other than the driveline, the remainder of the e-Golf is all Mk7 or Mk7.5 Golf parts. So, if a wiper motor goes, or a window regulator goes, a window switch fails, or the rear view camera acts up, it's nothing the tech's haven't seen on a gas or diesel Golf. I've debated going and parking it at the dealership just outside the showroom on a weekend, just to annoy the sales people with customers asking "What's that?", "How do I get one of those?" or "Can I test drive that e-Golf outside??".
If I want to challenge a VW tech with something they've truly never seen before, I will take my factory supercharged VW Corrado to the dealership. My local dealership touched it once, ~20 years ago, and broke parts they shouldn't have if they knew what they were doing replacing my heater core... In retrospect, they probably should have reviewed the Bentley manual I left for them in the passenger seat. Having owned a VW Corrado since 1997, I can assure you that both my wife and I have mastered the "how to get the part you need ordered from the parts department for a car they know nothing about behind the parts counter". I have contacts at other dealerships that I've used to order parts for my obscure VWs.
As for actual "routine service" to the e-Golf, you rotate the tires, top off the windshield washer fluid, check the antifreeze (G13) level, check the tire pressures, change the cabin air filter, and drive the car another 10k miles. If you drive the car right, you basically never wear out the brake pads, because the braking is mostly regenerative.
The sales team at my local dealership already warned me "None of our service techs are certified on the high voltage systems on an e-Golf". Great, if the dealership intends to support the upcoming ID series VW electric vehicles, they best start sending their techs to school for EV's... From what I understand from the forums, VW utilizes traveling techs to fill in when a dealership cannot properly support the needs of the customer with an e-Golf.