I interpreted
@Retink's post as how many viewers are there (as in watching LTT stuff) for scientific tech content. There's a genuine nerd demographic for tech on Youtube as mentioned by others before this post but I don't think that there is much overlap with Linus Media and that bunch. Linus is more "pop science" and if he were to shift away from that he'd probably lose a lot of those casual viewers who are there just for existing content.
Maybe my interpretation is wrong but I think it's a risk for Linus to apparently invest so much in something that isn't his bread and butter.