Another big, big difference, anybody, not just some black-hat pro with a long kill chain of zero-days, has a fantastic source of data to exfiltrate.

Perhaps you didn't note before, or are one yourself, but this includes e.g. abusive spouses. Sure, maybe the abusive spouse could hire a black hat, but this is very different to a drunk low-life wife-beater casually snooping through "recall".

It might not be a "new" attack vector, but its absolutely a complete degradation to any computer security.