[bjornjajayaja]

The problem with CSS has historically been browser conformance—naturally there’s been some workarounds. However, CSS has been a success because of its ubiquity. However, it is somewhat limited in its extensibility. For app development I really appreciate Qt Quick QML as it’s really nice language for UI development, but also highly extensible. Granted, different use case than CSS in ways.

[rchaud]

Bootstrap was effectively the jQuery for CSS, in terms of standardizing what layouts looked like across all browsers.

It gets a bad rap because it's so easy to use for non-designers that a lot of sites that use it don't bother customizing the UI elements like buttons or expand/collapse accordions etc. Or the layout of the page, for that matter. The famous "Every Bootstrap website ever"[0] site outlines this nicely:

[0] https://www.dagusa.com/