How much does read/write speed matter on a drive for gaming.

I'm currently in the process of building a PC and my motherboard has 3 M.2 NVMe slots. I was planning on buying a gen 5 and 4 to go in those slots and was gonna leave the gen 3 slot open for now. However I realized I got a 1TB gen 3 for christmas like 7 years ago so I went and dug it up. Its got a 3200 MB/s rw speed and I was wondering how much that would impact gaming to have a speed that low compared to the 7000ish speeds I'm used to. I still fully intend to use it for gaming as hard drives were plenty fine for the job and their speeds were far lower. I was just wondering out of curiosity.