Ludwig

The commerce module has to be installed with Composer..The Commerceguys provide now an alternative. With Ludwig one can install Commerce without composer. The Ludwig module (Ludwig von Beethoven was a deaf composer --Drupal fun--) shows the manual way.

Composer

You need composer to run some Drupal 8 modules. For some people this is scary... Ik have hundreds of students who chose a CMS in order not to use code... Now this seems far away.