At the end of October 2019 (about October 22, if possible), #reference_previews should go "full Beta". Since the Popups extension that holds the code for both #page-previews and #reference_previews is only enabled on certain wikis (all Wikipedias and a few selected ones), "full Beta" refers to these and only these wikis.
Popups is currently available on the following wikis:
```
'wmgUsePopups' => [
⠀⠀⠀'default' => false,
⠀⠀⠀'sewikimedia' => true,
⠀⠀⠀'wikipedia' => true,
⠀⠀⠀'enwikivoyage' => true,
⠀⠀⠀'hewikivoyage' => true,
⠀⠀⠀'zhwikivoyage' => true,
],
```
To do:
[] Create the necessary patch(es) to change the configuration.
[] Put the patch in a SWAT window and babysit it.
[] #reference_previews is available as a #beta-feature on the wikis already using the Popups extension.