The rise of preview environments? They've been popular for years. We were using them casually 10 years ago and didn't feel like it was on the bleeding edge. Kind of a weird marketing post.
The biggest issue we had with preview/review environments was resources not being cleaned up properly after destroying the environment (along with the associated costs), but that was more an indictment of our IaC code than anything else. It also didn't eliminate staged environments for things like the non-standard DB that we were using. As long as the changes on the DB side were net-new, it wasn't really an issue, though.
The technical implementation part can be interesting to readers and potential engineers who will use the platform and is worthwhile to have available, but this content is purely meant to cast a wide net.