@amber Yes! ACF Flexible Layouts is my go-to for a client-friendly modular builder. I have built sites with a hybrid Elementor and ACF Flexible Layouts set-up, which has worked just fine. I have never used ACF Extended, but that thumbnail preview grid is so beautiful I will have to give it a try! ✨
@amber I would use Elementor's Theme Builder to build the page templates (plus the header, footer, loop items, etc) and then ACF for the content modules & other custom fields. The client has the freedom to "go rogue" if they want with the Elementor builder, but most of the content building and editing is confined to the ACF modules.
Not the best approach for every client, of course. 😉