We have defined a module with a simple module.xml and a registration.php file,
to call upon the regular flow of M2 merged XML layouts, to define a Block class that feeds data into a PHTML template,
which is then outputting a JSON configuration array that was inserted into the Block class using an XML argument-array,
and which is then used to initialize a custom AMD-style JS component through the Magento_Ui/js/core/app component,
which connects our require JS component to our KnockoutJS component.
Then, our JS component injects the customer-data component to collect a bit of information about the customer, which is fetched through a kind of local-storage-cached-AJAX-call to the backend,
which is configured through a DI type that injects an array of section sources into a backend class,