Webflow grid and the grid system

Just a newbie question - how does the Webflow grid (new css grid feature) work with the 12 column grid system? Do we still need the greed system building pages with CSS grid?

Webflow grid is “flexbox” 12 col grid (Chrome → Inspect element to see the CSS code). The answer is yes (The " CSS grid" in one more powerful tool).

Flexbox vs. CSS grid
columns (webflow grid) vs. Flexbox grid

In other words for layouts now you got 3 main and/or options: