[kroltan]

Not the parent, but in my view it is basically a 1-dimensional subset of Grid, which is great for mostly-1D website design. But when it comes to making applications (which often use the whole screen, with tabs and whatnot, instead of being scroll-oriented), it makes some things either really difficult, either still requiring custom code to get it just right, or having a handful of wrapper elements for relatively simple layouts.

Don't get me wrong, it's _miles_ better for web layout than the old systems, but since Sciter seems to be focused on application-style layouts, it makes sense to prefer a layout system that can better represent common patterns in that domain.

Also, if you plan on go responsive, the required flex wrappers kind of hold you back when you need to reorient a bunch of your layout to fit a vertical screen (or horizontal, if you're doing mobile-first), while Grid's `grid-area` is beautifully flexible in that regard.

TL;DR: If you're gonna have to have Grid, then just having Grid is perfectly fine as it can do everything Flex can and more.