Sure, some of the technology and methodology is similar, such as wirework and stunt teams, but modern visual effects can portray things that classic special effects couldn’t — and that has absolutely loosened the reins on the imaginations of filmmakers.
As Samuel L. Jackson noted, film and television have been bringing comics to life for almost as long as mainstream comics have been around (the namedropped Superman show started airing in 1952), but there is also no questioning that the adaptations made now have a much greater ability to faithfully and realistically shepherd the material.