Right, I also don't think it can be underestimated the useful power of Bootstrap's documentation: it is very well put together in terms of being a largely well organized palette of options with copy and paste code directly beneath living examples. It's much easier to point non-front-end developers and junior developers at Bootstrap's documentation and tell them "find what you need and use that" than with many of the alternatives.
Admittedly semantic classnames are nice to haves, but they become a vocabulary you have to teach others, whereas Bootstrap has built a useful enough shared vocabulary and strong enough documentation on it that it is rather reliable across the spectrum of developer skill level and familiarity.
Admittedly semantic classnames are nice to haves, but they become a vocabulary you have to teach others, whereas Bootstrap has built a useful enough shared vocabulary and strong enough documentation on it that it is rather reliable across the spectrum of developer skill level and familiarity.