Thank god that today we are much better with browsers running remote code, having indiscriminate access to your filesystem, camera and microfone and syphoning data to mothership. /s
I don't think that is true, given that GNU Emacs either was based on principles of general Lisp implementations and it violated / did not support much of the MIT Lisp Machine (GNU Emacs: it's not a computer, the Lisp power was weakened, low-level Lisp was replaced with C, weak GUI, not GUI-first, it's not an operating system, ...) ideas.
> A spiritual successor to Emacs will not be a text editor, it will be a software environment that continues and further develops the principles the lisp machine operating systems were build on
I would think the first part ('software environment') is a useful goal, but the second part ('principles the lisp machine operating systems were build on') is not useful, since the Lisp Machine operating system is very foreign to modern users and very different what people know how to develop and use. That idea is also not supported by the user community. It would lead into a very small niche.
On a different note, while I concede that VSCode is "good enough" at most text editing, and might even be excellent at some things, I could absolutely never use it because I have an insane grudge against Microsoft as the supreme enemy of Free Software. That's another thing an Emacs spiritual successor will have to be, not in any way shape or form associated with the devil of the church of GNU.