I’m getting close to 45 ;)
By the way, what will there be new icons for a user like me? Who am i said when he hit 48 million he just got a black white square that said “next icon at 72 million”
Nah, not really because there's no way to know who will get close first.
I think most of the original icons shown in my image here were replaced around end of 2015, the new matrix and shooting star icons were added around end of 2018.