While change is imminent, normal, and healthy, manual testing isn’t going anywhere. It will be around for as long as the end user-your customers-are human.
Whenever any new feature is added or modified in the application, it raises the chances of breakage in the existing functionality, which might create bad user experience. To verify the application from end user’s perspective, it’s always better to have the application manually tested by domain experts who are able to imagine and execute complex business-specific scenarios (Click to Tweet). This sort of rigorous, critical thinking is uniquely human, and it cannot (yet) be replicated by test scripts.