AFCI breakers have electronics and are designed to detect arcing. They have been required by code here in new homes since 2017.
Good
A lot of areas or older homes out of code, if it exist, don't.
Consider this, the lit end of a cigarette is ABOUT 1,652 degrees.
An electrical arc at 120 volts, though less powerful than higher voltage arcs, can still reach extreme temperatures, potentially exceeding 35,000°F (19,400°C).
A current of 0.1 amps flowing through the body can be lethal. Currents as low as 0.03 amps can be fatal under certain conditions. Usually if it passes through a hand then your heart on the way to your grounded foot, if you're barefoot, or holding a ground in the other hand. Its the path it takes to ground that matters. If your brain or heart is in that path, good luck.
Wood normally begins to burn at about 400 degrees to 600 degrees F. However, when it's continually exposed to temperatures between 150 degrees and 250 degrees F., its ignition temperature can become as low as 200 degrees F.
I've been hit by 220 twice hook up 3 phase distribution tails to a transformer.,...I have 2 of 9 lives left. I lucked out, the wrench hit neutral too. Just through my hand to neutral.
First year of NASCAR in Chicago we lost a guy hooking up a 440v portable transformer/generator. I don't know why he didn't notice he was standing in a puddle of water, he died instantly.
A Flash arc is insanely dangerous and burns everything near it instantly.