Another thing is lead time. I built an app (https://signagesync.app/) to "multi-chromecast" websites and videos to Android TV, macOS, Windows and hopefully Samsung TV as well.

"Hopefully", because it took me literally 2 months waiting for the reviewer to test my app after it's submitted (to be fair, they did say "expect 6-8 weeks" upfront). They found some issues (crashes), so it was rejected, but I lost interest in resubmitting.