It was exactly what I want in a device: Do one thing and do it well.
I decided to replace it with a new "Chromecast" device to find out that it bears next to no resemblance to the original. Today's Chromecasts are just wannabe Roku devices with actual casting being relegated to the status of unwanted stepchild. It forces you to sign in to a Google account, which the original did not force you to do. The original was a small stick that could be powered by the USB coming from the TV itself, whereas the new one is a larger white puck that needs a wall wort and can't be powered by a regular (non-C) USB connection. My final disappointment was that VLC fails to cast to it, even though it worked perfectly with the original.
All I want is a way to cast any video I want to my TV. This is apparently a huge ask in 2024. I looked up alternative devices on Amazon and they all seem inferior or have deal breakers like trying to Do Everything(TM), not supporting 4K, using some weird protocol, requiring a login, etc.