The title is pure clickbait - it doesn't link to an article with a matching title.

It links to an online ruby textbook, last updated 2 years ago according to the gitlab repo.

As a long time Ruby developer the only thing about Ruby that I wish would die is people declaring 'Is Ruby dead?/Ruby is dead/Ruby isn't dead'!

What a fantastic source of information, especially the different design patterns https://i-love-ruby.gitlab.io/book.html#_design_patterns

I do not love Ruby but this is an excellent resource — bookmarked.