The GDB feature set has been largely unchanged since the 80s and even then mostly just parroted the design of other CLI debuggers from the 70s. Of course it is limited, you are talking about technology that was not even cutting edge nearly half a century ago.
To be fair, the core components of a low level debug agent are still largely the same, so it is not like the technology is bad per se. It is just that it only constitutes table stakes, a bare minimum foundation, these days. Even looking at 20 year old technology like time travel debugging that allows you to time travel execution back and forth gives a far better idea of what people are missing by using primitive tools.
To be fair, the core components of a low level debug agent are still largely the same, so it is not like the technology is bad per se. It is just that it only constitutes table stakes, a bare minimum foundation, these days. Even looking at 20 year old technology like time travel debugging that allows you to time travel execution back and forth gives a far better idea of what people are missing by using primitive tools.