Not really in my experience. Modern car electrics, as complex as they are, have been way more reliable than the nightmares in older vehicles I have dealt with. Engines too are a lot more predictable nowadays, and won’t have the random weird quirks older engines do. They obviously develop faults too, but they are usually easier to deal with rather than strange faults on older vehicles. However, I do think serviceability has sometimes taken a step back, as there’s a concerning number of cars that need you to take out the engine for certain servicing tasks that you are expected to do over the life of the car.