The rise of social media and 'smart culture' has led to huge, sudden interest over the past decade in all sorts of niche or esoteric subjects. Talented people are making a good living at math videos, TikTok tutoring, playing instruments on TikTok, reaction videos, food videos, etc. In the '90s, if you were a 'philosophy buff' your options were limited to academia. Now there is a devoted, captive audience for practically anything you can think of.