Why was material design lite(MDL) deprecated with MDC?

Question

which of the 3 high-level goals did MDL fail:

• Production-ready components consumable in an a-la-carte fashion
• Best-in-class performance and adherence to t

Answer 1

MDL only failed at being easily consumable in an a-la-carte fashion.

It is a bit harsh to say it failed at seamless integration with other JS frameworks and libraries although there were multiple issues.

Material Components for the web (MDC-Web) will hopefully be easy to migrate to. Time will tell.