Comment by tterrace

A recent example of this is buildbot. The current version (8.x) has a very no-frills, utilitarian python/jinja UI which has served me, personally, and many other open source projects well (chromium, mozilla, LLVM, etc). Version 9 is a rewrite two years in the making using angular with the modern JS toolchain for its frontend. I tried out the latest (beta) build, and from what I can see I think it's exactly what you describe: more resources with less functionality. Time will tell whether the final version lives up to its promises but I'm very skeptical at this point.