The only Hard requirements are a CPU with SSE 4.2 and POPCNT. Win11 will simply not install on older CPUs. The rest of the requirements can be bypassed but Microsoft will block you from the annual major feature upgrades. You will have to do those manually too. They also claim that your stability and performance on pre-8th Gen CPUs will be degraded and they will give no support, but in reality it runs just fine. Win11 is sluggish on all CPUs anyway.