Hacking on that level is very different from building and upgrading PCs, being able to mix and match components from a wide range of different manufacturers. You won’t or can’t build a serious NAS, Proxmox homelab, gaming PC, workstation, or GPU/compute farm from Raspberry Pis or FPGAs.
We are really lucky that such a diverse and interoperable hardware platform like the PC exists. We should not discount it, and instead appreciate how important it is, and how unlikely for such a varied and high-performance platform to emerge again, should the PC platform die.