Maybe I'm the outlier (mostly newer cars?) but I've never had to do more than take cars in for regular maintenance at service intervals. Most of the costs were for wear items like tires, brakes, wipers, cabin air filters etc. or for suspension things alignment. None of that is any different between ICE and electric cars.
I don't think I've ever had an actual drive-train issue.
IME, dropping off cars for service is a huge hassle, from either waiting a couple hours at the dealer or 2x shuttle pickups / or having someone drop/pick you up.
I did this every 6 months for my Tacoma, which was the required schedule for a new car to maintain the warranty.
I've taken my Bolt in once for a battery recall / cabin air filter in 6 years of ownership.
I often see less maintenance listed as a benefit of EVs. But according to Hertz at least, who have real world experience running large fleets of EVs and ICE cars, EVs end up being more expensive to operate due to lower residual values and higher repair costs. [1]
I don't think I've ever had an actual drive-train issue.