Ok, so you want to play the part of being an intelligent human being? I got you covered.

First, [all!] Electronics fail.
Yes, even medical grade electronics that are critical for sustaining a life. (redundant electronics necessary)

Second, you seem "surprised" because an SP10 caught fire, you therefore seem to consider it an issue of quality.
You also stated "you were lucky" because you were there to pull the plug. (?) <--

I am guessing you aren't properly hosting said device to be worried about burning down the place where you host them.
Not taking appropriate precautions is the bigger issue to keep in mind.

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Next, I see your SP10 did fail, (like all electronics from all manufacturers eventually will).
The question is, how often do these fail when operated properly.
I don't recall seeing many SP10's failing in this board. So I assume they are safe enough.
But don't take that as a sense of false relief, instead be prepared for when they do fail.

You stated you have ~40 some Ant miners. I am guessing you haven't set those up either in case of a fire in one unit.
Again, you don't sound like you are prepared for that eventuality.

Recommendation --> STOP overreacting.
There are no hardware from all these manufacturers that are not liable to catch fire.
Avoid the ones from manufacturers that consistently do have known issues.

When they do catch fire, have a plan in place.
If you don't, you might have one ANT catch fire and take out the entire [ANT farm]/lot.
It is ten times better if you had a plan for when you aren't there to watch for a fire.

Thank you for reporting the issue with an SP10, but it sounds like you have alot more serious issues than just one box that recently caught fire.