Netflix App for iOS No Longer Supports AirPlay
Because of 'Technical Limitations'
[Updated With Netflix Statement]
只節錄部分內容
Netflix apps are available on the Apple TV, consoles, smart TVs, iOS devices, and more, so there's not a real need to use AirPlay to watch Netflix content, but there were instances where it was convenient to use.
很多設備都有 Netflix App 可以播放內容，
所以其實不需要 AirPlay，只是對有些人來說會較方便。
Update: A Netflix spokesperson provided further explanation on the company's decision to discontinue support for AirPlay on iOS devices, attributing it to the rollout of AirPlay support on third party devices and an inability to distinguish between them:
"We want to make sure our members have a great Netflix experience on any device they use. With AirPlay support rolling out to third-party devices, there isn't a way for us to distinguish between devices (what is an Apple TV vs. what isn't) or certify these experiences. Therefore, we have decided to discontinue Netflix AirPlay support to ensure our standard of quality for viewing is being met. Members can continue to access Netflix on the built-in app across Apple TV and other devices."
網飛發言人表示因為 AirPlay 開始要支援其它設備使用，
他們無法辨識用戶是用 Apple TV 或是其它設備播放，
為了使用者使用上的品質，故不再支援 AirPlay 功能。
情報來源：
https://www.macrumors.com/2019/04/05/netflix-app-no-longer-supports-airplay/
大家覺得是因為：
1. 蘋果要推自家影音服務 Apple TV+，網飛不爽。
2. 讓太多不同設備能 AirPlay，增加被非法使用的機會。
3. 已經內建或可用 App 的設備太多，不再需要維護這功能。
4. 真的在不同設備上用 AirPlay 會不穩定。
其實本來能用，是這幾天網飛更新拿掉功能，
但果黑板好像都在罵蘋果，也是蠻趣味的。
我 mac HDMI接兩個螢幕，關掉主螢幕換電視播放的話，
Safari 會顯示不支援，但 Chrome 可以；
螢幕截圖 Safari 會是黑色擋截圖，Chrome 可以截到畫面，
也是蠻妙的，在 Safari 上似乎更保護版權內容。