Yes, when it was still relevant and heavily developed. So for a long time now I would've said chosen something else, more relevant to and convenient for modern-

Yes, when it was still relevant and heavily developed. So for a long time now I would've said chosen something else, more relevant to and convenient for modern-day web development. Of course if you chose YUI a few years ago and you're still using and relying on it, that means it is still serving you well. Was a great past decision ay?