Four card feature section (mobile-first approach)

I knew what I could use at first sight: I could use multiple flex-boxes like in the previous challenges. I had a second thought to use grid, but in the end I didn't use it because... firstly I'm not used to CSS grid, and secondly I was quite unsure that it was the right thing to do. Because I was thinking so much in grid because of the situation of adding newer cards to the section, but since in the design it wasn't requested that "new cards must follow a certain rule" I just opted to nested flexboxes. And I also like that SVG positioning worked first try. (Beside still inline, I indented the tags so they aren't as messy as before)

I said that I would have used grid for the card positioning. Is it really easier doing it on grid (by that I mean it wasn't needed to nest another flexbox in the middle element) or was I just thinking it wrongly?