LTS will be provided for one year for Angular 4.0 and 6.0
Long Term Support 喔？！
你知道 Ubuntu LTS 是支援五年嗎？
angular 已經算 Java 派系衍生，基本上都是力求穩定的 enterprise 在用了，還這樣搞。真是有病...
While the Angular team promises compatibility between consecutive major versions, developers are advised to keep an eye on deprecated APIs which might be removed two versions later after being depreciated.