Flexbox is a powerful tool for non-coders, but I'm always wary when a tool has hosting build-in.

I've not checked whether it's an option, but I suspect it's not. In which case, your website is tied to Flexbox for it's hosting. Which means a) no Flexbox, no website, and b) you can't take your website to another hosting company. Either way, it's not a compromise I'd be willing to take.

And CSS Grids can do pretty much anything Flexbox can (plus more), is fairly easy to code, and as it's part of the CSS language, you can use it on any website, on any platform, and once you've used it, host your website anywhere you like.

Yes, Flexbox is easy, but that ease-of-use could come at a hefty price down the line.

If you're thinking of looking at Flexbox, I'd strongly recommend you check out CSS Grids too. Just sayin's all.

Nice hunting @xawi