I keep hearing this, but it doesn’t seem more simple to me. My ISP won’t reserve me a /48, so I can’t control the management ips of devices on my network. The solution is apparently to set up dynamic dns, which I have no interest in doing.
The apparent issue here is that you're falling back to what's familiar- static IP addressing. How about mDNS?
(Unless you're putting them behind an IPv6 NAT, so thry can have their oen private /64).
It's not great, but it's an option!
