Getting our applications out of the cloud provided the main celebration for our exit, but seeing the actual spend tumble is the prize. See, the only way to get pricing in the cloud down from obscene to merely offensive is through reserved instances. This is where you sign up for a year or more in advance on a certain level of spend. Th...
Depending on your network, an ULA can help keep the local prefix the same, and use something like NPTv6 to translate the IPv6 address quite well. Unlike IPv4 NAT, NPTv6 will just swap out the prefix with a local one (i.e. 2001:db8:1001:1234:abcd to fd00::1234:1001 and back) so you can still use a normal IPv6 firewall and to the outside it’s like your addresses are all completely stable.
This will also make it easier to switch ISPs and adds the possibility to use a fail over from another ISP with another prefix without your entire network freaking out.
It’s not exactly recommended (prefixes should just be static ffs) but it’s a possibility.