I think I'm quite fair with other tools.
I shouldn't have used the word "toy" but I mean it. I really dislike tools such as Docsify or MDWiki and can clearly back this up: those tools rely way too much on JS, are not "progressively enhanced", are bad for SEO, accessibility... they have their little use-cases but you should IMHO avoid them in most cases if you are looking for building anything serious.
Other tools such as VitePress, VuePress, MkDocs, Nextra... are all great sane competitors of Docusaurus.
I just believe that Docusaurus is more featured and flexible, that's all.
These other tools have other advantages that Docusaurus do not always have, but I claim the right to defend Docusaurus where it really shines.
Sometimes being less featured is an actual advantage (simplicity). Sometimes being built on another platform (Nextra using Next.js, Dokz using Gatsby), frontend framework (VuePress, VitePress using Vue.js...) or language (MkDocs using Python) is another advantage.
I understand that my words might look offensive, and sorry for that. Please also take into consideration my feelings when you compare a 1 day home-made setup with a project being worked on since 2018.