[p1mrx]

It's much easier to build an IP layer 6-to-4 gateway (like NAT64) than a 4-to-6 gateway, because the IPv4 header doesn't have room for a 128-bit destination address.

The most practical "4-to-6 gateway" would be a SOCKS or HTTPS proxy, because those let the client connect directly to a hostname and not care about IP addressing. But configuring a proxy for all your home devices is probably more tedious than deploying IPv6.