There's not really a good cheap way to switch the mains. You either use a relay and it wears out after some definite number of operations or your use a semiconductor and gamble it will outlast the warranty let alone last longer.
Things like power supplies could be made a bit better, but there's a similar problem with electrolytic capacitors.
Ovens with the controls on top are another example.
That means you need a pilot light flame running all the time. Kinda wasteful. Ours has electronic ignitition- it could be fed from a UPS if I really wanted (just unplug it from the basement wall and plug it into the server UPS), but we've never lost power for very long. The module can be replaced when it gets old. Same with the high efficiency furnace- I've replaced the controller once and the HSI ignititor a few times. 20+ years old so the heat exchange will eventually go.