I have a Gen 1 chromecast, which was supposedly still supported till April.
I can tell you, that for the last~3 years of its life, it was pretty much useless. About half of youtube videos would stutter so badly it was unusable (ie. half the time they'd be paused).
Third party apps were also about only about half functional - the loading time of the app frequently meant there was a comms timeout before the app had loaded.
And the chromecast itself couldn't stay connected to any wifi network for more than about 20 mins - which obviously isn't great for something designed for TV watching.
Basically - support is useless unless they actually put enough effort in to make sure the product remains usable.
I can tell you, that for the last~3 years of its life, it was pretty much useless. About half of youtube videos would stutter so badly it was unusable (ie. half the time they'd be paused).
Third party apps were also about only about half functional - the loading time of the app frequently meant there was a comms timeout before the app had loaded.
And the chromecast itself couldn't stay connected to any wifi network for more than about 20 mins - which obviously isn't great for something designed for TV watching.
Basically - support is useless unless they actually put enough effort in to make sure the product remains usable.