I don’t know why you’re saying that. That is very misleading. You know well that plex’s current transcoder is not built with support for nvidia’s hw decoder (cuvid or nvdec). It is only built with support for nvenc which is nvidia’s hw encode.
Another plex team member recently commented (in reply to you) that plex will be building their transcoder with support for nvdec soon.
On windows, the hw decode is handled by dxva, which supports nvidia.
Edit: Found the link to the thread Hardware Accelerated Decode (Nvidia) for Linux - #29 by Ridley