Does Astra add Elementor?

I didn't find the answer I was looking for, why use both Elementor and Astra at the same time? it's a big hit combo!

I know Elementor is a WordPress builder, but isn't Astra a builder too? Can't I just use Astra to build a working e-commerce site?

Previously it took over 10 seconds to create the site to load. When I close Elementor, it starts loading in less than 3 seconds. I'm not sure if this is an issue with Elementor or the previous developer.