Having to modify code to add/remove breakpoints is pretty much the definition of jankiness. Can Emacs+SBCL show a list of all breakpoints, for example?
> This is a common complaint about CL, but my experience is that the utility of debuggers is vastly over-stated.
I disagree. A debugger gives you insight into the state of the program. It makes no sense to burn neural cycles trying to track program's state manually when a debugger can visualise it in multiple views and forms. Frankly, during development, I always run my code in a debugger, just to be able to confirm my assumptions on a granular level whenever I want to.
> the “repl-driven development” paradigm of CL
In my experience, trying to substitute a proper debugger with REPL leads to unnecessarily small functions, which then lead to very deep call stacks and undocumented assumptions about pre- and post-conditions of all those tiny functions. However, CL is specially bad about this anyway, since every `let` binding adds a new nesting, making long linear functions unreadable (either due to deep nesting, or due to predeclaring all variable as in ANSI C). Scheme with its `define` is much better in this regard.
