I run it on an NVIDIA Shield. Can't speak to any others with certainty, but from a quick search, there are guides for installing on Fire Stick and ONN devices too.
I suspect it'll run on just about any Android or Google TV device as long as the default launcher setting isn't locked down, and even then you can probably enable it with a couple quick ADB commands.
Not true, unless by "build yourself" you mean install Projectivy Launcher on any Android box that supports it.
I think the disconnect here is a lot of people buy the "lifetime" Plex Pass, which is a one-time cost and not a subscription. Saying "X feature will be locked behind a subscription" implies some new pricing model and leaves users who paid a one-time cost years ago wondering if it's time to look for an alternative or if they're completely unaffected.
"a subscription" is ambiguous as to whether it's being locked behind the existing Plex Pass or some new/additional subscription model. The title could have more accurately stated that remote streaming is becoming a Plex Pass feature. As is, Plex Pass users (many of whom bought the lifetime pass years ago,) can't tell from the title whether this is a new subscription cost or if they're completely unaffected.
"Clickbait" might be a little harsh, but I get where they're coming from.
I can only speak for Unraid, but I would imagine admin time is basically nil for any dedicated NAS distro if all you want is to store files. <10 minutes from scratch to install and boot, create an array and enable a share.