I feel proponents of any programming language put a lot of spin around what isolated aspects it is good for, but fail to illustrate what a programmer in even one target domain gains from using it.
Are there programming language implementations unlike what is described above, that you feel back up their marketing?
Hm, except in the way that being able to call into library functions “relatively easily” from the base language was a good way for others to create a bajillion handy libraries.
And once you’ve got those available to extend your language in any direction you want, you’re well on your way to ubiquitousness.