Currently
realgud is
part of Emacs Elpa. In the next major release, I will be removing from the core distribution the debuggers
ipdb,
jdb, and nodejs (the older protocol used that became obsolete by node version 8). Right now
ipdb is available via MELPA.
If folks would like me to add removed debuggers as separate ELPA packages, I'd be happy to do so. Likewise for jdb and nodejs. Either way they'll be available via MELPA.
There are a number of reasons for removing these debuggers from the core distribution. The main one for me is to make it easier for me to support. And vice versa, if there are people who are interested in those specific debuggers they can do so in a more limited and focused way. When there are updates to realgud, there is less code that needs to get pushed in the update. And users who don't or care about ipdb and jdb can simply not have these installed.
Initially it made sense to have those included because I hadn't worked out how the plugin mechanism would work. However at this point after having done a dozen or so of these as separate packages, I think the path here is now well trodden.