How to create a 'most popular content' view? I'd like to get a view block listing the most viewed articles.

What are the options to do that with drupal 8?

Note: I have activated the core module named 'statistics' and configured 'Increment a counter each time content is viewed.' But I cannot select that field for sorting in Views.
After activating the "Statistics" core module and checking the "Count content views" option in /admin/config/system/statistics, as you mention, you can select "Total views" as sort criteria (see screenshot).