If you die, your 100+ accounts are a nightmare for your family
cnn.com
cnn.com
As you get older, build up assets, have a family, etc, you then realise that you have a choice: pass on what you have built to your wife, children, nephews, friends, etc or let the government have it all when it passes to 'general revenue'.
Now that's your choice, pass it on to loved ones, or throw it away. Most of us would rather it went to the Retired Pussycats Home than let the government get its dirty hands on it.
Without your Will, the government can take the lot. (That rarely happens, but it's a good possibility. You know: Admin Fees, Storage Fees, Consultants Fees, Legal Fees, Fees for this, Fees for that. Amazing how quickly all those little fees can add up.)
I'm not particularly young and in fact do have assets. Perhaps more assets than most. I expect to have no need of them when I'm gone and don't particularly care what happens after that. I will write down a few passwords and general guidelines for whoever is left, but I figure they can do what they want at that point.
The first part is be LOCAL FIRST for anything, living the FDE key available in a safe, secondly having digital IDs, the PGP/GNUPG model, where anyone have a pair of keys, the public formally recognized by the State, and allowing third parties to accept the heir + notary as valid means to transfer an account properly. Aside all home systems must be IaC style, so anyone can manage them reading a single config repository NOT needing to know the current state of things outside the repo.
The main issue though is that anyone use computers, but only very few know them, as a result most of the population is digitally illiterate to a point of being unable to do all basic stuff they need to do.
The last friend I lost left 4 pages of "how to access, if I pass" information for his siblings. After two weeks of work at his house, with all his devices in hand...that still was not enough for them to get into several important things. And this was a family with PhD's, who'd spent their careers in hard science research.