There aren't many benefits from using IPv6 on LAN, as far as I can tell, unless you need more addresses than are available in the private address ranges.
Doesn't need to be a "traditional" container. Modulo noisy-neighbour issues, wasm sandboxing could potentially offer an order of magnitude better density (depending on what you're running; this might be more suited to specific tasks than providing a substrate for a general-purpose conpute service).
@gedhrel
wasm sandboxes can take IPs? Regardless, if we're just talking density, I can put multiple IPs on a single interface or create a ton of virtual interfaces. That's boring, though.
It's definitely an interesting hypothetical. Some homelabs that I've seen run crazy enterprise gear and are certainly capable of running thousands of very small containers, while others are running repurposed consumer equipment or SBCs like Raspberry Pis with less computing power and RAM.
Of course, in a self-hosted or homelab environment, there would be little utility to running that many network or web services. It would be a neat experiment, though. Seems like the kind of thing that Linus Tech Tips would attempt.