What was the scope for CORE JAVA in the existing situation?

Basic concepts of development languages are almost same except syntax.

If you know core java, then learning advance part (frameworks) will be easy.

On basis of basic concepts, easily you can learn any other programming language like Python, Scala.

As per my thinking Python and Scala will be the future of software development and AI.

Don't  worry Core java is evergreen language ,  it's future is bright , stick to u r  basic  OOP'   concept,

refer books like kathy sierra , u must have depth  knowledge in core java .