Isn't the perception of a saturated market persistent though? I mean, there were many social media apps when Facebook started. Twitter was created when microblogging had already become a trend.
Even the most pointed to example and seemingly saturated space, social media, had three major players emerge last decade: Instagram, Snapchat and TikTok.
Viber 2010, Pinterest 2010, Ask.fm 2010, Twitch 2011, WeChat 2011, Medium.com 2012, Slack 2013, Telegram 2013, Musical.ly 2014, Discord 2015, are all in related/overlapping space and have tens of millions of users.
