Oh, I mostly agree. I have never used the turbo CPU speed on my Ultimate64 yet, and extra graphics for me defeats the purpose of retro.
Network access is a bliss though. No need to swap SD cards or USB drives anymore, just FTP or SMB to your retro and be done. Ideal for developing and testing. And swappable ROMs is also ideal so you can switch between Oric standard BASIC, SEDORIC, dflat or Orix on the fly. So that would be about my wishlist