Ask yourself as to why and what may go pop. These 5 cylinder engines are not exactly made of chocolate and have large margins of engineering excellence built into them (unlike a Ford Focus RS for example). The gearboxes are pretty robust too and can handle up to 750nm. The Iroz Motorsport FL car has done 10k miles in various states of tune and currently runs around 750bhp (big turbo conversion) on stock internals and box (happy for someone to correct me on the latter). They plan to keep turning up the wick until it does break (to know the limits).
However, if you are a bit of an idiot and drive a car hard when its cold, insist on doing multiple launches one after the other for your mates and cane the nads out of it at every opportunity, then you should expect some trouble at some point.
Yes remaps can sometimes generate an occasional EML from a dodgy lambda sensor (simple to remedy), but choose your tuner and tuning parts wisely and you can still enjoy your car without any major issues.
Warning: The stock car is pretty good anyway, but once you start down the tuning path it can get addictive!