In the Q&A, a member of the audience asks about the security implications of storing this much data, and compares it directly to Windows Recall. The presenter, Scott, says a few right-sounding things, already having some language for this problem: that you make the world's greatest honeypot, that this is why he focused on collecting attention metrics instead of content, and that Microsoft implemented the feature very stupidly (and that WE can do it better). That last part in particular plays well to the ego of the audience.
But Windows Recall wasn't just badly implemented. It was badly conceived. It was data collection that nobody wanted, all risk, no reward. Not seeing that, makes it seem even more likely than it already did that Scott would fall into the same concept-level failures. His point about people storing their bank credentials on computers doesn't invalidate this point, it makes it more harrowing. Linux desktop security is not okay (which is why misguided people reach to containers for salvation).