I think the main issue people have with Roku is that it also does pretty extensive tracking of you, what you watch (ACR), what devices on your network, in some cases, what you say and so on.

And they shared this collected data with a bunch of third-parties.

In other words, they do the same stuff that OLED panel that you recommended never, ever be connected to the Internet does.

But don't take my word for it:

https://docs.roku.com/published/userprivacypolicy