I'm a bit confused by what you're saying. Are you saying that it's worth buying an Nvidia GPU because of the h265 performance? h264 is what most streaming devic

I'm a bit confused by what you're saying. Are you saying that it's worth buying an Nvidia GPU because of the h265 performance? h264 is what most streaming devices have the capability to hardware decode, and generally is the default target of transcoding. It's pretty rare to have a device that would force your files to be encoded in h265 as opposed to h264. For me the most common use-case for transcoding is decoding an h265 file and re-encoding it as h264. For my devices that can stream either format, I usually end up in direct play mode rather than doing any sort of video transcoding