on ye olde JLine 3 PR, @som-snytt had this checklist:

• Backend, nail down interface and protocol
• Colorization https://github.com/scala/scala-dev/issues/687
• Excise old continuation handling
• History and related features https://github.com/scala/scala-dev/issues/690
• Compile to functions, frontend manages inputs
• Coursier convenience (I guess this is "magic imports (ivy dependencies etc)" at REPL: Improved REPL #325)
• Hook up -x formatting and contribute to jline
• Fix // print JLine 3: fix //print #692
• Support camel-cased, anagram-style completion as previously https://github.com/scala/scala-dev/issues/691

We need to march down this list and figure out what was already fixed, and for the rest, make tickets here