I went through this recently and bought a Fractal Design Meshify 2 XL

https://www.fractal-design.com/products/cases/meshify/meshify-2-xl-dark-tempered-glass/light-tempered-glass/

Looks like it accommodates E-ATX

I have 13 3.5in hard drives in it. 3D printed caddies.

Pretty happy with the setup still.

That’s a fair point. I think home assistant initiates the connection, but I’m not sure how status updates work from the smart switch to home assistant. Could be home assistant polling, web sockets, or the switch broadcasting.

I get the security aspect of it, but in my case I can’t see a reason to go through the hassle. My smart switches talk to home assistant running on my server. I want new devices to be able to access the plex server without manual config. And my server is arguably the most sensitive machine on my network, so if I can’t protect that, I don’t think it’s worth protecting anything.