I've noticed this personally. In my early social media days circa 2012, going viral with a post of mine evoked genuine gratefulness for the post and appreciation for how much reach it got. Now, going viral is just a habit. 10,000 likes, 1000 shares on Facebook is my new normal. It's not 'special' like it used to be. I still appreciate my viral posts, just not to the extent of my early social media days (this is probably because fewer people were on it in 2012).