Internet unstable after recent update

[Archie1]

One of the reasons for not enabling IPV6 is to reduce the ability to track. This old thread from Reditt gives both the pros and cons.

A few more references

IPv4 vs IPv6: Internet Protocols and Online Privacy | Nym

Does IPv6 expose more of your personal data?

Yes, in many cases, IPv6 can leak more metadata than IPv4. That’s because it often assigns a unique address per device, sometimes linked to your MAC address. This makes it easier to track your activity across sessions and networks.

In contrast, IPv4 often uses NAT (Network Address Translation), which groups multiple devices under one IP address, adding a small layer of obfuscation. For privacy-conscious users, IPv6 is a double-edged sword: it’s faster and more scalable, but potentially more revealing.

Still another article

What is IPv6 and what are the privacy issues?

From the article

This lack of space forced the use of NAT and NAPT which provided a certain amount of privacy. While NAT cannot be considered a privacy solution by any mean, it does provide a layer of abstraction between network communications and the device to a degree.

This certainly increases user privacy since an outside viewer cannot distinguish what device made a particular request without deeper investigation beyond a NAT gateway. Now that IPv6 can provide more than 10000 trillion IP addresses for each human alive, we are looking at the future where each device on the planet has its own unique IP address.

That, together with the already huge problem of companies craving for our personal data so they can sell customer-specific ads becomes an undeniable concern.
…
We don’t want such personal information leaked even though this case wasn’t as serious as many of them are. Implementation of IPv6 hasn’t solved any of our problems and judging by many critics, problems are getting worse with each day.

With IPv6 address space being so huge it reduces the need for address recycling. This allows agents to harness the certain characteristics of an IPv6 to mark a specific user and its fingerprint. This would allow tracking of an individual as soon as they get online, even further diminishing internet user privacy.