You may have better luck asking at meta.
https://meta.discourse.org/t/experimental-discourse-layouts/21613
https://meta.discourse.org/t/experimental-discourse-layouts/21613/9?u=mittineague
https://meta.discourse.org/t/experimental-discourse-layouts/21613/10?u=mittineague
BTW
meta uses “Latest” as their “home” page, we use “Categories” as ours. Both pages exist both sites, just a matter of preference what’s used as “home”