PCIe 6.0 runs the risk of being too hot for gaming PCs to handle — just like PCIe 5.0
PCIe 5.0 already ran too hot, and PCIe 6.0 storage devices have all the signs that they might be even hotter.
If you've made any storage upgrades recently, you may have come across PCIe 5.0 SSDs. They're pretty fast, but right now, upgrading to them doesn't make a whole lot of sense. It's a lot more money for little benefit, and the major drawback of their power consumption and heat generated makes them difficult to actually use at full pelt. With the PCIe 6.0 specification being published by PCI-SIG, it's possible that it's going to run the exact same risk of being too hot to handle, or worryingly, even more so.
