Are french door fridges "not simple"? I've had one for ten years and it didn't have any issues, and I didn't buy a premium model either (no ice machine on the

Are french door fridges "not simple"? I've had one for ten years and it didn't have any issues, and I didn't buy a premium model either (no ice machine on the top door tho). But a friend of mine has a new one and it has the issues of the heat exchanger freezing due to bad insulation or something. I feel it's not that these things are very complicated, as much as the fact that it's a market for lemons.