Rasbperry Pis are losing their competitive edge for non-embedded applications to sub $150 mini PCs, which support Linux/Windows and will come with enclosure, NVMe slot, power button etc. The mini PCs are also generally much faster.
That's true as long as you don't mind using modified vendor supplied operating systems. Most of these advanced boards will lock you into some patched Ubuntu version.
So far from the ones I've worked only the Pi and a patched Rockpro64 allows you to boot some generic USB installer from UEFI and have the system your way with mainline kernel support.
I didn't see any mention of UEFI in my first read through about the Pi 5. Did I just miss it?
I would like to have a quiet and reasonably performant ARM aarch64 box at this price point, but only if it supports UEFI without needing to resort to silly EFI system partition tricks (which the Pi 4 required, last I knew).
The RPi4 has had a functional port of TianoCore for a while now, which is likely what they were referring to. You can use e.g. generic aarch64 UEFI Fedora images out of the box with it.