My answer from previous thread still works quite well for this question as well :- )
You can use DDR4 even for the newest Raptor Lake based i9 13900K, it’s the biggest benefit of the platform. You have to buy the respective board though.
You sadly can’t reuse all 8 modules of memory though, only Threadrippers and Xeons have 8 memory slots.
It will not cause any meaningful bottleneck in Corona Renderings and majority of workstation tasks.
You can reuse your 750W PSU, but you have to use low-powered GPU and ideally power limit both CPU and GPU. 750W is very little for current CPUs & GPUs, mainly because of transient spikes (300W GPU can temporarily use up to 500W, even if it’s just fraction of second).
You can use your D15S cooler with Raptor Lake and Ryzen alike. You might just need a bracket, Noctua sends it for free if you still have sale receipt.
You can reuse your case, but you will need to keep the front open all the time for enough air-flow. Latest CPUs & GPUs run very hot.