Bootstrap 3 vs 4. Is there a global difference?

Question

Bootstrap

I'm a beginner coder and I'm wondering how much 4 bootstrap differs from 3 in your opinion, isn't 3 too outdated?

Answer 1

So far, not too outdated. It differs in the technologies used. Bs3 - floats, Bs4 - flexes
https://caniuse.com/#feat=flexbox

Answer 2

3 - on floats
4 - on flexes
PS They still type on floats, but they don't teach this anymore. Floats are essentially a crutch in grids. Float itself was not created for large grids, but for the purpose of enveloping the image with text.

Answer 3

As said earlier, the difference is in float(3), flex(4), but grid + flex is better, without Bootstrap)

Answer 4

I personally liked more than 3, it has more detailed and understandable documentation.
But in 4 I liked the adaptation more, there is a col class that doesn’t need what resolution it belongs to, well, plus different alignments