PCIe 5.0 drives are not cost-effective yet, and to those saying that this is overpriced and unnecessary, you are right - because these drives aren't for you.
If you're a consumer doing anything other than 8K RAW video editing, a last-gen, budget, DRAMless PCIe 3.0 x2 drive like the SN550 with its paltry 2.4GB/s performance will be almost indistinguishable from anything faster in day-to-day use. Without running a synthetic sequential SSD utility like CrystalDiskMark you'd never know that your SSD was behind the curve.
So who is this drive for? It's hard to generalise, but if you REGULARLY need to read and write large, sequential datasets and you are sure the SSD is your bottleneck, then you are the target audience. Even if you edit 8K RAW footage, unless you do it REGULARLY, you're not going to care. Premiere and VEGAS both have software inefficiencies and I've seen both of them fail to max out the 25Gbit NIC when pulling files from an enterprise all-flash array. You likely need to have a very-specific task that needs sequential throughput and that's not a common enough requirement to generalise it into a category of user, or workload.
TL;DR, you don't need the speed unless you know exactly WHY you need the speed. If you think your SSD is slow, it's highly unlikely that your SSD is the real bottleneck.