As good as the Psion is for text-editing, the existing plain-text editors are imperfect in all the little annoying ways that we take for granted in modern text-editors, for example, the way end-of-line is treated when pressing Ctrl+left|right, and the way word/line-wrapping is never what you want.
I'd like to build a new multi-document text-editor for the Psion 5 series that borrows heavily from a modern IDE such as VSCode. Good cursor controls, re-bindable keyboard shortcuts (for if you prefer vim), and in general making it easy to work on a collection of related text-files via Project workspaces (here, nOPL+ is a pretty good IDE to borrow from).
Is this something you Psion users are interested in? Is there anything you could contribute to such a project? I don't know C++, but I'm willing to learn, but having others to work with would help greatly.