Shaun, I get it. My dad lived to be 99, but the last 5 years were a slow slide. Mentally fine, body giving out. We'd talk, and I'd manage his affairs. One day, he asked me to consolidate all of his account to Vanguard, which I did. Then he had a TIA, and when he came to, he wanted to see a statement. Well, stuff was not onboarded and he thought I stole it. Took a long weekend of various family members to explain. Once lucid, he was more than apologetic.
Anyhow, yeah, its sobering. Particularly for those of us that aren't "married". I have an s/o for many years but we've just never bothered, but its getting practically such that we should.
In any event, help those cleaning up the mess:
https://www.amazon.com/Oh-****-Im-Dead-Thoughts/dp/B09XZVMYVZ or similar. Password manager and they have master password. Explicit instructions about where assets are and how to access. POA's filled out-many institutions won't recognize a general power not on their form until a court intervenes-find that out in advance.
And tell 'em where the keys to the Porsche(s) are.