I think ptpython would have been a much better choice. It is relatively small with few dependencies, much more feature complete, importantly it can run in windows terminal AFAIK which pyrepl can't at the moment. I suspect it has also seen much more testing because it is much more widely used.

This really seems like a missed opportunity, instead of another repl that will only be used by developers (they even stated that as primary motivation) who can't install anything else, they could have taken a repl that would actually be widely used to integrate into other programs... Instead I suspect pyrepl will eventually experience the same fate as the current repl, i.e. it will languish with no development and get replaced again eventually because it has become to painful to adjust to changes in the rest of the language and changes in terminals.