Thank you for digging into this and sharing your experience.
I took a different route and looked into this, if one wants to apply "enterprise" deployment techniques at home.
Best case about 250 Android devices in a household with a single subnet.
Due to my ISP broken #IPv6 delegation I'm left with 8 devices in my main subnet. With full support for this.
*context*
/59 delegation and a few VLANs with /64 and one #homelab with /60 leaves me with a /61 in my main VLAN.