Hi, I'm Kenrick from Indonesian Wikipedia and was not happy that you proceed, without communication with us, to require all gadgets to use ResourceLoader per the MediaWiki 1.26 update. Hence, all of our legacy gadgets are unusable until someone reported it today. Although the fix is simple and I've done it in less than 15 minutes, I think it is still a good idea to inform communities before doing a change that may break the legacy gadgets. Thank you.
Topic on Talk:ResourceLoader/Migration guide (users)
Informing communities before the breaking changes
+1. This broke a lot of things, and confused and frustrated a lot of people. Not everyone has the technical understanding to figure out what the problem is and how to fix it - we just see things that aren't working.
Same here. It's also really not obvious how to find this page once the tools have stopped working. I've added a note at the top of ResourceLoader to help other people encountering this issue. (see https://www.mediawiki.org/w/index.php?title=ResourceLoader&type=revision&diff=1822030&oldid=1761375 - I can't figure out how to add that link properly here, since neither wikitext or html works!)