Derwin McGeary ✅ is a user on octodon.social. You can follow them or interact with them if you have an account anywhere in the fediverse.
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DNS Nameserver changes take ages to propagate! It's a nice example of speed being part of usability: I might not have done it right, but I have a 48 hour window to guess/second-guess.
Why yes, I hadn't done it right, thanks to the interface on namecheap not being obvious as to how to commit the changes.
Now all is working though.