I actually used Lisp to implement an early (1995) social media platform, which provided a low barrier to entry and allowed me to try things quickly, beating the averages for a few years.
I wouldn't think of lisp as the next best choice.
Quickly written spaghetti code with massive tech debt could be delivered fast enough to gain a huge competitive advantage - does that mean modern SW dev should venerate that approach?
Never underestimate how powerful a low barrier to entry is for trying things quickly. In a winner take all market like social media, it’s very possible the choice of PHP over something like lisp gave them a huge advantage.