if IPs can change several times, how do apps deal with functionalities that required your previous IP? Also, why is IPv6 not the norm (i.e. in video games, web browsing, etc.)?
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1. IP’s are for routing, they’re not for identification. Applications know they can always change, and are designed to handle that. If your IP address changes, the app will just set up a new session.
2. IPv6 is a very gradual and ‘invisible’ phase-in, about 40% of the world has it now, and steadily increasing by 4-5% per year as one network after the other gets upgraded. Backwards compatibility with IPv4 is almost seamless and widespread (most people never notice they’re on IPv6), so it’s likely there will still be lots of IPv4 ‘islands’ on the internet for many decades – but nobody will particularly care because those are connected to the wider IPv6 internet through proxies, tunnels and NAT64.
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