Have you ever built something at $DAYJOB where you thought, "how is there not a service that provides this?" or "why do I need to build this in-house?" or "this

Have you ever built something at $DAYJOB where you thought, "how is there not a service that provides this?" or "why do I need to build this in-house?" or "this vendor's sales process sucks -- this could be self-serve." Marinate on those projects a bit.