TYPO3 Core

The final of bootstrap 4 is out.It comes with many good features

• It use flexbox (https://www.w3.org/TR/css-flexbox-1/) is very flexible for responsive design
• the architecture is modular and has no bloatware (like bs3)
• for measurement use rem insteas px
• Only Support for IE10+ and iOS 7+ but you can use this hack (https://github.com/coliff/bootstrap-ie8) for IE8 and IE9
• intuitive handling and support native SCASS/SASS prepocessor
• 5 grid tier instead 4 grid tier: also for smaller than 480px viewpoint devices
• refactored JS-Plugin for EcmaScript 6.
• BS4 is the future

It would be nice if TYPO3 9 LTS migrate to BS4.