IPv6 isn’t just a larger IPv4. There are features inherent to it, like link-local actually functioning and being predictable, unlike APIPA in v4 which was grafted on as an afterthought and breaks more than it works.
It also functions router-less. You can grab 30 10-port switches and just stick them together and start plugging computers in. It will work without configuration or an authority.
I am all v6 internally, but that’s not because I have a splatillion devices, but rather it’s just better and easier to manage.
How much slack did you have in your 10.* network? Or was it literally 16.7 million devices?
IPv6 isn’t just a larger IPv4. There are features inherent to it, like link-local actually functioning and being predictable, unlike APIPA in v4 which was grafted on as an afterthought and breaks more than it works.
It also functions router-less. You can grab 30 10-port switches and just stick them together and start plugging computers in. It will work without configuration or an authority.
I am all v6 internally, but that’s not because I have a splatillion devices, but rather it’s just better and easier to manage.
16M devices on one network would almost certainly have major scalability problems all its own. SMB chattiness alone . . . shudder.