Mozilla recently tried to integrate some AI stuff into its MDN. The corresponding Github issue is correctly titled “MDN can now automatically lie to people seeking technical information”.

¯\_(ツ)_/¯

https://github.com/mdn/yari/issues/9208

--no-preserve-root is a security option to keep you from accidentally removing all your files. Make sure you always use it along side the -f option and -r which stands for rescue - meaning rm will create a rescue copy of the deleted data.