Removing full front-end support for IE6, IE7 and IE8 also has many benefits:
- Many features are not available to IE8 and under: caniuse.com: IE 6,7,8,9
- Reduces the amount of code delivered to browsers on each request, potentially improving performance in all browsers e.g. html5please. Core now ships with jQuery 2
- Frees up time previously spent developing and testing IE6 and IE7 fixes, allowing core developers and contributors to work on other tasks.
IE8 support is more important than IE6 and IE7. As such, core will still provide HTML5shiv to allow CSS to be applied to new elements on IE8 and under. For users needing IE8 support in Drupal 8 an unofficial IE8 module is available.