Earlier quoted context omitted.
Can a pi achieve the same iops? I'd be highly suspecious of any such claims.
I don't know why people love Pi-s so much. They filled a niche, once, years ago, and were quickly outcompeted not even a year and a half after. Get some old i7 or Ryzen, get a big case, put 12-18 HDDs, spend a little extra on quality cooling solution if you have the server in your bedroom / living room, install modern Linux, tinker to your heart's content.
power draw. running 24/7 it makes a huge difference in overall power usage, and by switching from a repurposed desktop mobo & cpu, to a dedicated low power saved me thousands in electricity costs every year.
that fact that in EU power isn't cheap... is also a main reason for keeping total power draw as low as possible.