The Corsair case is of good quality, that should last a really long time, think up to or more than 10 years if you take care of it.The 360 AIO is a bit overkill, you can still sell it if you want since the 5700G can be cooled by a simple 120mm tower cooler but Corsair AIOs should still last for a very long time.Maybe that is also the reasoning of your friend of why he chose it. Its still a potent processor, plus if you GPU for some unknown reason dies, it has its own graphics unit so you can still use your PC. The 5700G is a cut down Zen 3 when it comes to the 元 cache.