No, it's not because I lied when I was seventeen. It's because of field_ui.settings.

Commerce default currency depends on Drupal default country setting. Set Drupal default country before enabling Commerce to get the currency that fits your country.

Informationen über Funktion des Drupal-Datenbankcache mit Blick auf (Speicher)platz-Verbrauch in Zusammenhang mit mysql-Binlogs und Beschreibung eines konkreten Szenarios mit einer Kombination von Drupal-Datenbankcache, memcached und binlogs.

Scenario:
You install a contrib module that supplies configuration via config/install, but the configuration does not match with your system setup. This may result in a ugly (though not breaking) error during installation of your project. You can repair this later on by importing the correct config (for example via drush cim --partial), but the error during installation of the project will persist.

You can add an extra field to a Drupal entity via hook like it is described here: https://gorannikolovski.com/blog/display-and-form-pseudo-fields-drupal-8...

There is one caveat to this explanation. If you use field groups to group such extra fields you need to put them into a container (at least for the form extra fields), otherwise they will not show inside the field group.

So instead of this