Nobody says there is a 99.9% chance of killing your Xbox. However, nobody can argue with me that a bad TSOP flash is more of a thorn in anyone's side than a bad mod flash. With a bad mod flash, you can disable the mod and still use the Xbox as if it was unmodded. You then have the option of using an exploit to reflash your mod. With a bad TSOP flash, you're forced to install additional hardware (a mod chip) to recover.
To all the above hardcore anti-modchip 'I'm-a-TSOP-badass' posters:
I am very much not a pussy because I use a mod chip. I'm prudent enough to preserve the TSOP as is. I don't mind forking over a couple bucks for a high-quality product. Also, this 'math' isn't hurting me because I already own all the equipment necessary to solder. If you call paying for a modchip a rip-off, what to do you call owning a whole other Xbox for Live, as you had recommended?