One of the compelling things for me is the ecosystem of bootstrap-based "themes". As a developer with enough design sense to realize I can't do design, I love I

One of the compelling things for me is the ecosystem of bootstrap-based "themes". As a developer with enough design sense to realize I can't do design, I love I can work with a simple markup format and more or less drop in a theme to get a decent look, without having to think a lot about design or have an actual designer. For the internal tooling I primarly work on, bootstrap has meant a vastly improved look and feel over what I would have done before. From this perspective, Bootstrap is basically an API you can develop against. For customer-facing products and websites (where you can have actual designers involved) it's maybe not as compelling, or even a negative ("oh look, a bootstrap site"), but it's fundamentally not a worse choice than any other framework or programming language.