Board Thread:Script Suggestions/@comment-1158325-20160320103956/@comment-11733175-20160320110440

I sincerely hope Gadgets do not become discontinued. Disregarding that it's a far more flexible and user friendly system than requiring users to edit their personal JS files, it's also completely the opposite line WMF are taking - Wikipedia are actively moving their JS to Gadgets as it's a superior system. Gadgets allow a more modular way of writing JS, and losing it now would be a huge shame.

Back to the original question, I looked at implementing something similar a year or so ago and concluded that anything that we might implement would be much better implemented by an improved version of Gadgets (which coincidentally is finally being implemented on WMF wikis). Moving it to a 3rd-party pure JS system feels like a massive hack when you get to anything beyond the basic and simple parts of it, as does anything implemented in JS that really should be done server side.