Isn't that niche the same as the niche of programs that can realistically max out a modern desktop CPU? Video encoding, compression, and things like that?
But I wouldn't doubt that things like Video encoding / compression uses this. Again, I was not saying it's not valuable just saying that for my use case where I don't encode videos for a living or run a large Handbrake/Plex video farm / library the i9 cpu is not worth as much to me as the cheaper, cooler running Ryzen 2700.