Whoosh!
Bootstrap is going the way of table layouts. Table layouts were great too but times change. Right now we have CSS Grid and it works in all browsers. I am sure they will bring this goodness to Bootstrap 5 but there is no need for the new layout engine that works great in all useful browsers to have a framework wrapper.
Similarly with the jQuery, it was once useful in a table layout kind of way but nowadays you might as well just write ES6 javascript rather than learn how to do things the special jQuery way. Frameworks are dead in a similar way to how the internal combustion engine is.
Using the intrinsic properties of the browser is where it is at in the same way that electric is where it is at in the automotive world. The fact that everyone is stuck with their excuses for frameworks (and ICE engines) does not change matters. Hence I read this news with all the enthusiasm of a Tesla owner reading about Peugeot developing a more efficient diesel engine.