It may seem like not much changed, but it was one of the motivating factors for the big push for TLS everywhere after it was revealed that PRISM was tapped into and mirroring unencrypted communications. Also Signal probably wouldn’t be as popular as it now, with people still using unencrypted communications.

One of the NSA’s missions is to protect all of the federal government’s computer networks from cyber-terrorism. You could argue that in light of what Snowden revealed, the increased focus of security and encryption did more to protect all of the federal government’s computer networks from cyber-terrorism than any other NSA initiative ever.