I also had my fair share of repairing home appliances (trying to anyway) and in my N~5 sample size I was not only limited to failed control boards. But having s

I also had my fair share of repairing home appliances (trying to anyway) and in my N~5 sample size I was not only limited to failed control boards. But having seen those control boards I am honestly surprised that they even survive the warranty period. They are that cheaply and badly made. From the circuit board itself to the components used. And of course not designed to be repairable at all. They have more in common with a cheap calculator than something that controls kWs of power. But allowing the manufacturer to use leaded solder would have made zero difference in their reliability. People absolutely can build reliable electronics these days, but it will be slightly more expensive than not quite so reliable electronics. Higher profit margin has a higher priority than making sure the product survives long after the warranty period has ended. Especially if the consumer only looks at the initial price without taking into consideration how long it will last. Which is also hard to do without reviewers tearing the machine to bits. Being expensive does not mean it is actually any good and will last a long time.