I have been looking for Page Builders that can achieve 3 things together:

1. Great Content Creation/Editing Experience for a non technical person (Marketer, Admins etc). Give WordPress a run for their money when it comes to Editing and Content Creation Experience.

2. Ability to switch to Dev mode and edit code directly (For devs). Ideally be able to choose between frameworks.

3. Ultimately, publish as a static site (may be integrate with things like Netlify, Cloudflare Pages etc)

So far, Most page builder products are either 1 and 2, 2 and 3 etc. Game changer would be a product that does all 3 seamlessly. I would totally invest in that :)