Exactly, this my point. If you want to make a great editor, the proper thing to do is start from a good base. Start from emacs and make something like doom emac

Exactly, this my point. If you want to make a great editor, the proper thing to do is start from a good base. Start from emacs and make something like doom emacs or spacemacs, etc. Or start from vim or whatever. Text editing at speed is a solved problem. It's just 'not-invented-here' syndrome. I admit that base emacs may not be everyone's cup of tea... that's fine. Just download one of the many pre-configurations.