The problem with HDDs is rarely the sequential speed but the IOPS; of which you get around 100 per second. The problem is that since the majority of machines h

The problem with HDDs is rarely the sequential speed but the IOPS; of which you get around 100 per second. The problem is that since the majority of machines have SSDs now developers no longer optimise the number of IOPS or care about it; or notice it at all - as SSDs have orders of magnitude more IOPS performance than a HDD. Combine that with many people having quite a few background programs that will spew IOPS randomly you'd be surprised how fast the disk gets slow. Even MacOS which until recently (and maybe even now) sells machines with a HDD as standard; with pretty much no extra software installed is unbearably unusable on a HDD. SSDs are basically required at this point.