This is true, but I mean, it's a bicycle. The maintenance in 4 years of daily-driving my VanMoof X2 has been some grease, and new brake pads. But as somebody else said in this thread, the battery is another matter. Once that goes, that's probably the end of its useful life as a commuter bike.
I thought about getting an extra battery now while I still can, but I (like, I suspect, most people buying these rather pricey bikes) probably don't plan to stick with e-bike tech that is 5+ years old. Since 2008, my 2019 VanMoof is my 4th ebike. And man is each generation hugely better than the last.
These ebikes basically improving at a similar rate as iPhones, and it's pretty great.