He's Right: Consumer Mobile is Hard
" i can’t think of many consumer facing mobile apps that have gained massive traction and sustained it in the past three years. can you?"
Yes, Good Consumer Mobile Value in Last 3-5 Years
Not lots sure, but it's not dead
SnapChat, Periscope, Lyft Instacart, LINE
To Name a Few
Consumer Non-Mobile Has More
Let's Keep Grinding