Do you worry about the registra going down during that time? I guess ICANNs records should include the lease length and as long as you can prove you exist at the correct physical address or whatever you can "reassign" it to a down stream registra?

The ___domain pre-exists ICANN. I guess I’m counting on money and receipts still being being valid. If I ever find myself with a fear that hints at a breakdown of society or the monetary system I pull back and reorient my perspective.

If society fails planning likely won’t help.

I think a lot of people make bets like this that are very black and white. It's also very possible that something goes wrong at the registrar and your receipts aren't accepted because they don't have any records of it on their end. And society doesn't collapse but you're still screwed.

In this case I think 30+ years of ssl certs and other ephemera would help in this world where network solutions disappears but there is still an appeal to paperwork.

Sometimes luck is all one should relay on.

100 years is too long, you will completely forget to renew

I think I’m also auto paying. I figure I’m giving a 100 year head start on finding the paperwork.

I have told my kids but who knows if there listening. I’m in process of buying a sailboat and wondering how important a ___domain name is.

It’s safer to regularly have a transaction with the registrar. This serves as a sanity check that they keep record of your registration. Without any interaction, a lot can go wrong over decades, and you might notice only too late.