This way back machine shows how Maple debugger looked like in the year 2005 (that is 20 years ago) in Maple 10.

And it is pretty much the same debugger today. Here is a screen shot side by side of recent version

20 YEARS and nothing changed.

The debugger in Maple is one, if not the main, selling point for Maple compared to its competitor for many.

Even the article above says this

     "But the big plus about the Maple language is that it has a debugger! "

     "Also, the existence of a reasonable debugger in Maple is a big plus. From
      personal experience, I can tell you that debugging Mathematica Notebooks
     can be both time consuming and frustrating."

Can the debugger be improved, so it is easier to use? 

All what is needed is to change the UI so  one can see more code as they are stepping in, like with Matlab debugger for example.

That is all. Currently it is a pain using the debugger, since one only sees one or 2-3  lines at time as they step in the code instead of seeing complete code with full screen which makes it much easier to see things.

Instead of Maplesoft wasting time on AI and cosmetics, do something practical for developers and improve the debugger.

It should not take a software company 40 years just to improve a UI for a debugger. What is the blocking issue here? 

Just hire one or two programmers and they can do this in 6 months.