That is an interesting question that goes beyond social media accounts like Facebook or even FR.
I went 100% digital some years ago as in I do all my banking and bill paying on-line and even file my taxes electronically. I dont get any bills, nor any bank statements in the mail and prefer it that way. I keep my bank balance and reconciliation in a password protected Excel spreadsheet. I dont even print much of anything out but instead save email notifications of bill payments for a few months, and even copies of my tax returns and other financial docs are saved digitally or scanned into a PDF and the paper docs shredded, all password protected in a hidden folder.
So if I were die tomorrow (and Im not getting any younger) unless my executor (who is my nephew) had the password and PIN to even get into my laptop in the first place and then the user names and passwords for all my various accounts, he would have a hard time even knowing what bills I had (other than the two CC's I have in my wallet), the account numbers, who needed to be contacted or paid from my estate, etc. I am guessing he could contact my bank and provide them with a DC and a doc showing he was executor and go from there but it wouldnt necessarily be easy.
If he could get into my laptop, and Im sure he or some talented IT person could break in, hed have access to my FB and FR accounts because Im never logged out.
It’s definitely something that needs examination.