Once prominent celebrities and more news agencies start to come (and they will, the BBC is a sign of that) the culture will shift faster than you really realize. There is still an insular culture around the fediverse that tends to be a big barrier around entry for “normies” right now. Going on a mastodon instance as a new user with limited technical knowledge can be quite jarring especially if you step out of line of what it seen as culturally fitting for the fediverse