I have a google chromecast (w GoogleTV) and the UI and lag is becoming a nuisance.
With Apple TV, do you get apps like Twitch and YouTube? Do livestreams work well? The most common apps I use are Twitch and YouTube but also Max, Netflix, Crunchyroll and Amazon Video.
i was in the same boat as you. had google tvs in every room (4k chromecast). so laggy, and slow I ended up buying 1 apple tv just for the main room. Now i have apple tvs in every room lol. So much better experience. its worth the price especially if you can get them for sales