You don't "download a library" with popular bootstrap alternatives. You look and see - "oh, this requires sass. sass requires some libs, or npm, or something

You don't "download a library" with popular bootstrap alternatives. You look and see - "oh, this requires sass. sass requires some libs, or npm, or something else. Now I need to know how to go install those (assuming I'm on a machine I can install software on right now), then make sure it's all downloaded and installed correctly (because there are multiple ways to install it 'wrong'), then learn how to use those tools, then learn how to use them well enough to make something decent, the learn how to bundle/deploy that to my website." You're not saving anywhere near "20 seconds" using bootstrap CDN vs the alternatives (and frankly, not even using bootstrap itself, if you pull it down and configure and compile all its options as well). You're saving hours or days of learning up front, and focusing on getting something basic up and running, then determining what style/ui changes are required later. But keep making the false comparison between "downloading" vs "learning portion of multiple ecosystem and technologies" - you're coming across as quite learned here.