HoloLens 2 had higher pixel density than AVP at 2K horizontal resolution at 43deg HFOV. So yeah, you just didn't know HoloLens had 23megapixel displays to show high resolution text for coding, nearly a decade ago.
The problem was the same as today. Dead numb market response to non-SteamVR VR/MR/AR/XR headsets.