Why do you think other games like DBD eventually fail?

It's always the same pattern. People are "Absolutely certain." This next asymmetrical horror game will be the one to kill DBD.

This game is so much better and DBD is on the decline. It's more fun and etc etc etc.

So what do you think these games do wrong that DBD somehow manages to avoid?

Three obvious examples up though not necessarily the only examples but the biggest in recent memory.