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I type a phone number exactly once. When I enter it into my contact book. After that, I only ever tap a person's name.

Phone numbers are definitely obsolete.

Nitpick: This is like saying handlebars on a bicycle are obsolete because you only have to install them once.

Phone numbers are abstracted, but they are definitely not obsolete.

You could use the same argument to say IP Address are obsolete because of DNS, but I don't think IP addresses or phone numbers are going away any time soon.

IP(v4) addresses are going away though! No one but the network staff will notice.

Semantically, choosing "obsolete" might have been incorrect, but I think the point stands. IP address and phone numbers don't matter anymore to the end users.

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