Sorry, but at that point READ THE ARTICLE, or better its sequels!
How is writing two to ten times the code "easier?" How is sharting on HTTP parallelism and caching models "better for performance?" How does it help accessibility to have a "screen media only f*** everyone else" attitude?
Or do those things quite literally mean jack shit to you? Because the ONLY way one could think the claims of merit assigned to failwind or bootcrap are true, is to be utterly, totally, and completely ignorant of the purpose of semantics, concepts like media targets, basic accessibility, caching models, and every other meaningful metric of quickly, easily, and simply building a website or application.
FRAMEWORKS ARE SCAMS. If you don't see it that way, you might want to consider you don't know as much about HTML or CSS as you think.
Because again, how is writing two to ten times the markup than you should have form markup AND CSS combined giving you "quick development?"
Especially when the result is utterly incompetent bloated trash.