The Electronic Design article has factual errors. It confuses inductive loads with lamp loads.
Incandescent lamps have very high inrush current, which is hard on switches and connectors. In my aircraft, I add inrush current limiters to my lamp circuits, since I wig-wag them in flight, and the current pulses normally can exceed the switch lamp ratings. LED lamps are OK.
The old fashioned gas-tube strobe power supplies are the worst of all. They have a characteristic of increasing load current as input voltage drops, which can cause thermal runaway on switches and connectors, resulting in failures. I have experienced this and I have photos of fried switches somewhere in my piling system.
The flip side of current rating is the voltage rating. As others have pointed out, fast-acting switches reduce contact erosion. Most significant for DC circuits is voltage spikes caused by switching inductive loads. These are normally protected with 1N5400 type diodes (example contactors). The forgotten ones are electric primers, pumps, and flap motors. It's good practice to use protection diodes for these types of loads as well. The flap motor needs back to back Transzorb type diodes because it runs both ways. If you have a flaps controller, these will be built in.
Of course, with Honeywell discontinuing the TL switches, we have a bigger proble…
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