ng build compiler command and the
yarn build bundler command running production builds by default. The goal would be to improve integration with many deployment providers, such as Heroku, Netlify, and others, according to Minko Gechev, who works on Angular at Google. Another item on the prospective features list is improved error messages, with top 10 errors getting much more detailed error messages and docs.
Other capabilities eyed for Angular 12 include:
Release of the ng-linker, to allow distribution of Angular Ivy libraries to NPM. This would allow deprecation of the compatibility compiler and improve build time.
Tearing down the test module and environment after each test. This revision would significantly improve test speed.