Per https://lists.wikimedia.org/pipermail/wikitech-ambassadors/2018-September/001955.html, "we are no longer allowing ordinary pages to be loaded as javascript (That is, ?action=raw&ctype=text/javascript )."

This does not appear to be the case.

I created "TNT Test OhYes" (old rev) on test.wikipedia, and could load it via mw.loader.load('//test.wikipedia.org/w/index.php?title=TNT_Test_OhYes&action=raw&ctype=text/javascript'); in User:TNTPublic2/common.js.

I've done a couple of similar tests on enwp just in case test.wikipedia is behaving differently for some odd reason - ordinary pages can still be loaded as JS.

As the change should only allow "fully protected pages in the MediaWiki: namespace or user javascript subpages" to be loaded as JS, it's possible the change has not worked as expected.

I cannot find any mention of a phabricator task (though it's probably understandably hidden) - it is possible the change was reverted, in which case apologies for the pointless task.