[topranks]

ULAs are standards compliant but tbh it's a layer of complexity I rather not have.

Just give me GUAs and be done with it.

[cassianoleal]

GUAs are dependent on the PD you get from your ISP. Change ISPs, all your IPs change. ISP decides to change the PD, all your IPs change...

[labcomputer]

Or your router reboots, or...

The nice thing about ULAs is that you can have completely static addresses for internal services.