No, honestly, it isn’t, and many people can’t even tell the difference between NVME SSD and SATA SSD.sata is slowwwwwwww
I think what some folks (including especially those who got sucked into the conspiracy theory that was SSD-Gate not long ago, blaming Apple for “crippled” M2-generation SSDs) fail to realize is that the maximum speed of an SSD isn’t the primary benefit of the SSD. It’s a marketing term more than anything - a way to differentiate SSDs and get people to pay more $ for a given SSD.
The primary benefit of the SSD is I/O. A massive reduction in latency. An ability to access data on the SSD in parallel (so that if you run one app and (gasp!) run another at the same time, the entire operation doesn’t fall over, like it does on a mechanical hard drive.)
And at that, both the SATA SSD and the NVME SSD perform very well. It’s quite common to see near-zero difference in MacOS boot times, for example, between an NVME SSD and a SATA SSD.
Sure, in raw performance and max bandwidth benchmarks the NVME is, in fact, faster. But for most day to day things, the actual performance difference is tiny compared to the massive gulf in performance between both SSDs and a mechanical hard disk.