1. It's well-known that Fiori represents the leading design principles for all SAP applications providing a harmonized user experience across on premise and cloud solutions, while SAP UI5 is a concrete implementation framework for Fiori.
And the reason why SAP decides to decouple Fiori UX from UI5 is already clearly explained in the news:
The key of the decoupling is SAP Fiori Fundamentals, a light-weight presentation layer, which is not a new UI technology but a collection of stylesheets and HTML tags ready for direct consumption by UI developers.
As is emphasized in the news, SAP Fiori Fundamentals will never replace UI5, but enables Fiori UX to be more open and flexible enough to support other popular UI framework like React, Angular, Vue etc.
It's time for practice now.
Jerry's team is currently responsible for some prototype development, and my colleagues prefer to use Vue, so in this blog let's try Vue with Fiori Fundamentals.