595
Google is discontinuing the Chromecast line
(www.theverge.com)
This is a most excellent place for technology news and articles.
I have a smart TV as well, but refuse to connect it directly to wifi. As I tried that when I bought it and it insta-bricked itself and had to go through the hassle of returning a delivered TV.
A custom ROM for this device would be interesting. I know that the Chromecast 4K can do a custom ROM, but only if it was running an older os version before you flash it, as the bootloader couldn't be unlocked after.