I read a great longform article once about a woman who had no episodic memory (I can't find the article so I'm bound to get the details vaguely wrong).

She lived a perfectly normal life, even to the extent that she assumed people were "faking it" when they talked about stories from their past. And she was happy.

It was utterly fascinating (as are all such stories on memory and the brain). But also a good lesson I thought about how we don't necessarily need all of our past history - that it doesn't define us to the extent that we may think.