Frankly, Bootstrap is exactly that, for me. I've been converting our products (Webmin/Virtualmin, which are 15 and 10 year old codebases, respectively, and it shows badly in the current UI). Converting to Bootstrap, while extremely time-consuming, is not requiring significant design skill on my part to make everything look freaking awesome.
Thank you for redesigning Webmin. I used it for a client's server and the functionality was fantastic, the design a bit less so. A Bootstrap'd frontend sounds fantastic.
It is also immediately theme-able with any Bootstrap theme, which is a major leap forward. And, it is responsive...another major leap forward. The old way of handling mobile is to have a custom theme for mobile devices (currently based on Joe Hewitt's iUI, which is pretty long in the tooth, and looks like ancient iOS versions).
We're about a week away from an alpha release (suitable for testing in the wild), a month away from a beta release (suitable for daily use by people who understand how to file bug reports), and two months away from it being the default theme in all of our products, both Open Source and commercial. Assuming I am able to maintain the current pace of development.
Bootstrap (and maybe moreso, jQuery) is pretty miraculous, honestly. I've tried to do this on two separate occasions in the past with YUI and ExtJS, and failed miserably, because they simply don't work well in a progressive enhancement environment (and my brain doesn't work the way their developers brains work...jQuery fits my Perlish brain a lot better).
