Pry and byebug paved the way in a lot of ways for this work, but they break in fundamental ways across a range of use cases, such as multithreading, multifiber,

Pry and byebug paved the way in a lot of ways for this work, but they break in fundamental ways across a range of use cases, such as multithreading, multifiber, or quirk around exception handling. While these are all fixable, so we're the lack of standard quality tooling , which is quietly being addressed by irb and debug gems.