Yes, lets say Guile never really makes as an Elisp replacement, that would be another case, although apparently Guile-Emacs effort was relaunched, lets see.

30 years ago it was another matter, Emacs culture back then was pretty much against the cool features from XEmacs, a bit like GCC versus what made clang exist in first place, in terms of how Stalman would vouch against such features.

In any case, the 1% remark is quite relevant given how many still reach out to Emacs in modern times.