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I took my first college network engineering class in the fall of 2000. The professor was retired from the profession and nearly retired as a professor, but so excited about how this cool new thing that was coming. “IP addresses are running out. Imagine an addressing system capable of generating a unique address for every blade of grass on the planet. In a few years you’ll need to learn this new system” I’m sure he’s passed on by now. And I’m sure IPV4 will outlive me.
Really only protects you for about ten years. It’s not like they’re suddenly going to become repairable at the 5 or 10 year mark.