I have a pretty big hunch that majority of people stepping into this hobby are prone to higher failure rates due to two distinct issues.
1) Terrible grounds. Just because metal is touching metal doesn't make it efficient. The alternator can only push out what a ground can handle. Huge voltage drops will take place with poor grounds.
2) Volume knobs..err...Gain. I meant gainEven a lot of "pro" audio shops eff it up *forehead slap*
Fundamentally speaking, if you can get those two things right and you've purchased quality equipment you should have a reliable system so long as you touch up those connections every now and then.
So with that...yes...some kinda caddywhompas whatever person who's just looking for bling will typically catch fire going down the road. But they usually have a lot of other things happening at the same time
Edit: I completely understand the forewarning and I'm glad the rest of the members can see the two distinct approaches. FYI, I've used sundown amps, cadence, PPI, a/d/s/, memphis, alpine, blah blah blah. I go through a lot just because I like to play. I'm currently enjoying my ZED Leviathan. Thinking about getting the Kronos to match it for a 3-way active idea. The most internal fusing(through the amp) I've had is ~250. in my driver seat I've measured as mid 130's c weighted and 120's a weighted with a couple setups. No idea what it is now. But I like loud and clean. Matt's more of a pro audio driver kinda guy. He prefers concert level at a minimum ;P I like my hearing though