Emacs has questionable technical underpinnings. It is an old project; they've all learned a lot since the 1970s. ELisp wouldn't be built that way today, it wouldn't be written in C, it'd be designed with keybindings for a modern keyboard - probably cloning vim. Break from Emacs tradition and build something that is good at editing text maybe.
Firefox faced a similar challenge from modernity with changing security and performance demands. But they chose to remove XUL killed off their own extension ecosystem and put them in a permanent "Chrome but worse" category that they have been unable to escape from.
In some ways it is impressive that Emacs has managed to avoid being killed off in a massive rewrite attempting to chase other text editors. The temptation much be there, it has a lot of deficiencies. But it is a unique and rewarding piece of software for anyone who wants what it does.